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WO2018181616A1 - Récipient et procédé de fabrication de récipient - Google Patents

Récipient et procédé de fabrication de récipient Download PDF

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Publication number
WO2018181616A1
WO2018181616A1 PCT/JP2018/013043 JP2018013043W WO2018181616A1 WO 2018181616 A1 WO2018181616 A1 WO 2018181616A1 JP 2018013043 W JP2018013043 W JP 2018013043W WO 2018181616 A1 WO2018181616 A1 WO 2018181616A1
Authority
WO
WIPO (PCT)
Prior art keywords
lid
seal
container
palm
outer edge
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2018/013043
Other languages
English (en)
Japanese (ja)
Inventor
麻貴子 高橋
渡辺　薫
洋 石川
聡志 滝本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dai Nippon Printing Co Ltd
Original Assignee
Dai Nippon Printing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from JP2017065855A external-priority patent/JP2018167859A/ja
Priority claimed from JP2017065754A external-priority patent/JP2018167857A/ja
Priority claimed from JP2017187125A external-priority patent/JP2019059522A/ja
Application filed by Dai Nippon Printing Co Ltd filed Critical Dai Nippon Printing Co Ltd
Priority to US16/499,041 priority Critical patent/US11479399B2/en
Priority to CN201880020981.2A priority patent/CN110475729B/zh
Priority to EP18777998.8A priority patent/EP3604165B1/fr
Priority to KR1020197031735A priority patent/KR20190134686A/ko
Publication of WO2018181616A1 publication Critical patent/WO2018181616A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B27/00—Layered products comprising a layer of synthetic resin
    • B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
    • B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D51/00—Closures not otherwise provided for
    • B65D51/16—Closures not otherwise provided for with means for venting air or gas
    • B65D51/1633—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element
    • B65D51/1638—Closures not otherwise provided for with means for venting air or gas whereby venting occurs by automatic opening of the closure, container or other element by means of an element bursting upon a predetermined pressure in the container being exceeded
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
    • B65D65/38—Packaging materials of special type or form
    • B65D65/40—Applications of laminates for particular packaging purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2052—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the container being weakened
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/10—Container closures formed after filling
    • B65D77/20—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers
    • B65D77/2024—Container closures formed after filling by applying separate lids or covers, i.e. flexible membrane or foil-like covers the cover being welded or adhered to the container
    • B65D77/2028—Means for opening the cover other than, or in addition to, a pull tab
    • B65D77/2032—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container
    • B65D77/2044—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure
    • B65D77/2048—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut
    • B65D77/2056—Means for opening the cover other than, or in addition to, a pull tab by peeling or tearing the cover from the container whereby a layer of the container or cover fails, e.g. cohesive failure whereby part of the container or cover has been weakened, e.g. perforated or precut the cover being weakened
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/225—Pressure relief-valves incorporated in a container wall, e.g. valves comprising at least one elastic element
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D77/00—Packages formed by enclosing articles or materials in preformed containers, e.g. boxes, cartons, sacks or bags
    • B65D77/22—Details
    • B65D77/30—Opening or contents-removing devices added or incorporated during filling or closing of containers
    • B65D77/38—Weakened closure seams
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D81/00—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents
    • B65D81/34—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package
    • B65D81/3446—Containers, packaging elements, or packages, for contents presenting particular transport or storage problems, or adapted to be used for non-packaging purposes after removal of contents for packaging foodstuffs or other articles intended to be cooked or heated within the package specially adapted to be heated by microwaves
    • B65D81/3453—Rigid containers, e.g. trays, bottles, boxes, cups
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2398/00—Unspecified macromolecular compounds
    • B32B2398/20—Thermoplastics
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/40—Closed containers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B2439/00—Containers; Receptacles
    • B32B2439/70—Food packaging
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2205/00—Venting means
    • B65D2205/02—Venting holes

Definitions

  • the embodiment of the present disclosure relates to a container including a main body portion having a trunk portion and a flange portion, and a lid portion joined to the flange portion, and a manufacturing method thereof.
  • a main body having a barrel portion that defines a storage portion and a flange portion that extends outward from the upper portion of the barrel portion.
  • a container including a portion and a lid portion joined to a flange portion.
  • the container is provided with a vapor venting mechanism for discharging water vapor generated when the contents are heated by a microwave oven or the like to the outside.
  • the steam release mechanism includes a through-hole formed in the steam release seal portion of the butting portion (joint portion) of the lid portion.
  • a palm portion is formed by overlapping a part of inner surfaces of two multilayer films.
  • the end portion of the multilayer film is exposed to the outside at the tip portion of the palm portion, there is a high possibility that germs and the like are mixed into the container from the tip portion of the palm portion.
  • An object of the embodiment of the present disclosure is to provide a container that can effectively solve such a problem and a manufacturing method thereof.
  • a container having a storage unit for storing contents is A main body portion having a trunk portion defining the housing portion, and a flange portion extending outward from an upper portion of the trunk portion; A lid part joined to the flange part of the main body part via an outer edge seal part so as to cover the accommodating part, and a lid part constituted by a lid material folded back at a folded part so that a part thereof overlaps; With The lid portion is positioned so that the portion of the lid material overlaps and a palm portion extending in a first direction from an edge portion on one side of the lid portion to an edge portion on the other side, and sandwiching the palm portion, the lid portion A first lid portion and a second lid portion made of a material,
  • the joint portion includes a joint seal portion in which inner surfaces of the portions of the lid member are joined so as to extend in the first direction from an edge portion on one side of the lid portion to an edge portion on the other side, and the joint seal Including a through hole or a notch
  • the maximum distance between the inner edges of the outer edge seal portions opposed in the first direction D1 is the outer edge seal portion opposed in the second direction orthogonal to the first direction. It may be smaller than the maximum distance between the inner edges.
  • the flange portion includes a first edge and a second edge facing each other in a second direction orthogonal to the first direction,
  • the palm portion may extend in the first direction on the first edge side with respect to the center point of the housing portion of the main body portion.
  • the maximum distance in the second direction between the center point of the housing portion of the main body portion and the inner edge of the outer edge seal portion along the first edge portion is L1.
  • L2 / L1 is 0.3 or more and 0.6 It may be the following.
  • the seal strength of the palm seal portion at a width of 15 mm at 25 ° C. is 12 N or less.
  • the steaming part may include the through-hole formed in the joint seal part so as not to reach the folded part of the joint part.
  • the through hole may at least partially have a shape extending linearly along the first direction.
  • the steaming part may include the notch formed in the joint seal part in the folded part of the joint part.
  • the axis that is the minimum distance when the two points of the outer edge of the outer edge seal portion are connected through the central point of the storage portion is defined as the A axis, and the central point of the storage portion is passed.
  • the axis connecting the two points of the outer edge of the outer edge seal portion so as to be orthogonal to the A axis is the B axis
  • the length of the A axis is shorter than the length of the B axis
  • the palm portion may be provided along the B axis while traversing the accommodating portion.
  • the ratio of the length of the B axis to the length of the A axis may be 1.2 or more and 3.0 or less.
  • the bottom material constituting the main body portion includes a thermoplastic resin layer constituting an inner surface located on the housing portion side, and a base material laminated on the thermoplastic resin layer. And having at least The base material of the bottom material may include a stretched film.
  • the bottom material may further include a printed layer.
  • the tensile strength of the bottom material may be 40 MPa or more.
  • the container according to the first embodiment of the present disclosure further includes opening means formed on the lid and the flange,
  • the tear strength of the main body and the lid may be 15 N or less.
  • the flange portion includes a first edge and a second edge extending in parallel with each other,
  • the unsealing means may be configured to easily tear the flange portion extending along the first edge portion at a position inside the outer edge seal portion extending along the first edge portion.
  • the unsealing means may include at least a notch or a scar group formed in the flange portion.
  • a container including a steaming section that has a storage section that stores contents and that is configured to communicate the storage section with the outside when the pressure of the storage section increases.
  • the manufacturing method is A body part preparation step of preparing a body part having a body part defining the housing part and a flange part extending outward from an upper part of the body part; Filling the body portion of the body portion with contents, preparing a lid portion for covering the housing portion, Bonding the lid part to the flange part of the main body part to form an outer edge seal part, and
  • the step of preparing the lid portion includes a step of preparing a lid member for constituting the lid portion, a step of folding the lid member at a folded portion so that a part of the lid member overlaps, and forming a palm portion, A step of joining the inner surfaces of the portions of the lid member in the joint portion to form a joint seal portion, and a step of forming a through hole or a notch constituting the steaming portion
  • the main body portion preparing step includes a step of preparing a bottom material for configuring the main body portion, and a drawing process is performed on the bottom material to form the body portion. Forming the step.
  • the bottom material for configuring the main body portion includes a thermoplastic resin layer that forms an inner surface located on the housing portion side, and the thermoplastic resin layer. And at least a base material laminated, The base material of the bottom material may include a stretched film.
  • a container includes a main body portion (container main body) including a trunk portion that defines a housing portion, and a flange portion that is provided over the circumference of the upper portion of the trunk portion, and a main body And a lid member joined to the flange part so as to cover the accommodating part of the part, Between the flange part and the lid part, an outer edge seal part is provided over the entire circumference,
  • the lid portion has a palm portion where the inner surfaces face each other, The palm portion has two first palm seal portions extending from the flange portion toward the tip of the palm portion, and a second palm seal portion located between the two first palm seal portions,
  • the axis that becomes the minimum distance when connecting the two points of the outer edge of the outer edge seal portion through the center of the housing portion is the A axis, and the two points of the outer edge of the outer edge seal portion are perpendicular to the A axis through the center of the housing portion
  • the axis connecting B is the B axis
  • the joint portion may be formed by folding a single base material.
  • the steaming unit may include a cut, a notch, or a hole.
  • the outer edge seal portion may be formed with a width of 3 mm to 7 mm.
  • the ratio of the length of the B axis to the length of the A axis may be 1.2 or more and 3.0 or less.
  • a container having an accommodating portion for accommodating contents is A main body having a body part defining the housing part, and a flange part extending outward from the upper part of the body part, and a main body part constituted by a bottom material (first laminate); A lid part joined to the flange part of the main body part via an outer edge seal part so as to cover the housing part, and a lid part constituted by a lid material (second laminate); A steaming portion configured to communicate the housing portion with the outside of the container when the pressure of the housing portion increases; and
  • the bottom material has at least a thermoplastic resin layer constituting an inner surface located on the housing portion side, and a base material laminated on the thermoplastic resin layer, The base material of the bottom material includes a stretched film.
  • the bottom material further includes a printed layer provided on the base material so that the display portion can be visually recognized when the main body portion is viewed from the outer surface side of the bottom material. You may have.
  • the bottom material may have a tensile strength of 40 MPa or more.
  • the bonding strength between the flange portion and the lid portion may be 23 N or more.
  • the depth of the body portion may be 5 mm or more and 20 mm or less.
  • the thickness of the bottom material may be 150 ⁇ m or less.
  • a container having a steaming portion that has a storage portion that stores contents and that is configured to communicate the storage portion with the outside when the pressure of the storage portion increases.
  • the manufacturing method is Preparing a bottom material (first laminated body) for constituting a main body having a body part defining the housing part and a flange part extending outward from an upper part of the body part; Forming the body by drawing the bottom material; and Filling the barrel with contents; A step of stacking a lid member (second laminate) on the bottom member for constituting a lid portion covering the accommodating portion; Bonding the lid material to a flange portion extending outward from the upper portion of the body portion of the bottom material,
  • the bottom material has at least a thermoplastic resin layer constituting an inner surface located on the housing portion side, and a base material laminated on the thermoplastic resin layer,
  • the base material of the bottom material includes a stretched film.
  • the bottom material is a print provided on the base material so that the display unit is visually recognized when the main body is viewed from the outer surface side of the bottom material. It may further have a layer.
  • the bottom material may have a tensile strength of 40 MPa or more.
  • a container having an accommodating portion for accommodating contents is A main body having a body part defining the housing part, and a flange part extending outward from the upper part of the body part, and a main body part constituted by a bottom material (first laminate); A lid part joined to the flange part of the main body part via an outer edge seal part so as to cover the housing part, and a lid part constituted by a lid material (second laminate); A steaming portion configured to communicate the housing portion with the outside of the container when the pressure of the housing portion increases; An opening means formed on the lid portion and the flange portion, The tear strength of the main body portion and the lid portion is 15 N or less.
  • the flange portion includes a first edge portion and a second edge portion extending in a first direction parallel to each other,
  • the unsealing means may be configured to easily tear the main body portion and the lid portion in the first direction.
  • the unsealing means includes the flange portion extending along the first edge at a position inside the outer edge seal portion extending along the first edge. It may be configured to facilitate tearing.
  • the bottom material includes a thermoplastic resin layer that forms an inner surface located on the housing portion side, and a stretched film that is stretched along the first direction. And at least a base material.
  • the unsealing means may include at least a notch or a scar group formed in the flange portion.
  • a bonding strength between the flange portion and the lid portion may be 23 N or more.
  • the body portion may have a depth of 5 mm or more and 20 mm or less.
  • the thickness of the bottom material may be 150 ⁇ m or less.
  • a container including a steaming section that has a storage section that stores contents and that is configured to communicate the storage section with the outside when the pressure of the storage section increases.
  • the manufacturing method is Preparing a bottom material (first laminated body) for constituting a main body having a body part defining the housing part and a flange part extending outward from an upper part of the body part; Forming the body by drawing the bottom material; and Filling the barrel with contents; A step of stacking a lid member (second laminate) on the bottom member for constituting a lid portion covering the accommodating portion; Bonding the lid material to a flange portion extending outward from the upper portion of the body portion of the bottom material, The flange portion is formed with an opening means, The drawing is performed at a temperature at which the temperature of the bottom material is lower than the melting point of the thermoplastic resin layer of the bottom material.
  • the tear strength of the main body portion and the lid portion may be 15 N or less.
  • the flange portion includes a first edge and a second edge extending in a first direction in parallel with each other,
  • the unsealing means may be configured to easily tear the main body portion and the lid portion in the first direction.
  • the container according to the first embodiment of the present disclosure it is possible to prevent germs and the like from being mixed into the container from the distal end portion of the palm portion.
  • FIG. 2 is a cross-sectional view showing a case where the container shown in FIG. 1 is viewed along line II-II. It is sectional drawing which shows one modification of the vaporizing part of a container. It is sectional drawing which shows an example of the laminated constitution of the bottom material which comprises a main-body part. It is sectional drawing which shows the other example of the layer structure of the bottom material which comprises a main-body part. It is sectional drawing which shows the other example of the layer structure of the bottom material which comprises a main-body part. It is sectional drawing which shows the other example of the layer structure of the bottom material which comprises a main-body part. It is sectional drawing which shows the other example of the layer structure of the bottom material which comprises a main-body part. It is sectional drawing which shows the other example of the layer structure of the bottom material which comprises a main-body part.
  • FIG. 41 is a cross-sectional view showing the container shown in FIG. 40 as viewed along line XXXI-XXXI. It is sectional drawing which shows an example of the layer structure of the laminated body which comprises a main-body part and a cover part. It is sectional drawing which shows the other example of the layer structure of the laminated body which comprises a main-body part and a cover part.
  • FIG. 1 It is sectional drawing which shows the other example of the layer structure of the laminated body which comprises a main-body part and a cover part. It is a figure for demonstrating the measuring method of tensile strength. It is a figure for demonstrating the measuring method of tensile strength. It is a figure for demonstrating the measuring method of tear strength. It is a figure for demonstrating the measuring method of tear strength. It is a figure for demonstrating the measuring method of joining strength. It is a figure for demonstrating the measuring method of joining strength. It is a figure which shows the manufacturing process of a container. It is a figure which shows a mode that the accommodating part of a container communicates outside. It is a figure which shows a mode that a container is torn.
  • FIG. 57 is a cross-sectional view showing a case where the container shown in FIG. 56 is viewed along the line XXXXXVII-XXXXVII.
  • FIG. 1 is a plan view showing a container 1 according to the present embodiment.
  • FIG. 2A is a cross-sectional view showing the container 1 shown in FIG. 1 as viewed along line II-II.
  • the container 1 includes a main body portion 10 in which a storage portion 101 for storing contents is formed, and a lid portion 20 joined to the main body portion 10 so as to cover the storage portion 101.
  • a steaming portion 30 is formed for discharging steam generated in the housing portion 101 by heating the contents to the outside of the housing portion 101.
  • joining is a concept including both welding and adhesion.
  • Wilding means attaching the lid 20 to the main body 10 by at least partially melting at least one of the main body 10 or the lid 20.
  • Adhesion means that the lid 20 is attached to the main body 10 using components such as an adhesive that are separate from the main body 10 and the lid 20.
  • the content accommodated in the main body 10 includes at least water.
  • contents include retort food, frozen food, refrigerated food, and the like. Further, the contents may contain relatively little moisture such as fish fillets and dried fish.
  • the main body portion 10 includes a trunk portion 11 that defines the accommodating portion 101, and a flange portion 12 that spreads outward from the upper portion of the trunk portion 11.
  • drum 11 contains the bottom part 11a and the side part 11b standingly arranged from the bottom part 11a so that it may spread over a periphery along the outer edge of the bottom part 11a, for example.
  • the flange portion 12 is connected to the upper portion of the body portion 11 over the entire circumference.
  • the lid portion 20 is disposed on the upper surface of the flange portion 12.
  • bottom surface refers to a state in which the container 1 is placed so that the housing portion 101 of the main body portion 10 opens upward. 1, the position and direction of the main-body part 10, the cover part 20, and those components are represented.
  • the “outside” is a side away from the center of the housing portion 101 of the main body portion 10 in plan view.
  • the “inside” is a side closer to the center of the housing portion 101 of the main body portion 10.
  • the bottom portion 11a and the flange portion 12 have a substantially rectangular outline.
  • the flange portion 12 includes a first edge portion 13 and a second edge portion 14 that face each other, and a third edge portion 15 and a fourth edge portion 16 that extend between the first edge portion 13 and the second edge portion 14. ,including.
  • the first edge 13 and the second edge 14 extend in the first direction D1 in parallel with each other, and face each other in the second direction D2 intersecting the first direction D1.
  • the third edge portion 15 and the fourth edge portion 16 extend in parallel to each other in a second direction D2 that intersects the first direction D1, and face each other in the first direction D1.
  • the second direction D2 is orthogonal to the first direction D1.
  • “Parallel” means that the angle formed by the direction in which one edge extends and the direction in which the other edge extends is 20 ° or less.
  • “intersection” means that the angle formed by the direction in which one edge extends and the direction in which the other edge extends is greater than 20 °.
  • the corner portion of the flange portion may have a circular arc shape that is chamfered and convex outward.
  • the corner portion of the flange portion may have an angular shape that is not chamfered.
  • the outline of the bottom part 11a and the outline of the flange part 12 may be similar, and do not need to be similar.
  • a lid portion 20 for covering the accommodating portion 101 of the main body portion 10 is joined to the upper surface of the flange portion 12 via an outer edge seal portion 18.
  • the flange part 12 does not need to be joined to the cover part 20 over the entire region, and the flange part 12 is not joined to the cover part 20.
  • reference numeral S ⁇ b> 1 denotes the maximum distance between the inner edges of the outer edge seal portions 18 facing each other in the first direction D ⁇ b> 1, i.e., from the inner edge of the outer edge seal portion 18 along the third edge 15.
  • the maximum distance in the first direction D1 to the inner edge of the outer edge seal portion 18 is represented.
  • the maximum distance S1 is equal to the maximum distance in the first direction D1 between the inner edge of the third edge 15 and the inner edge of the fourth edge 16 of the flange portion 12.
  • Reference numeral S2 denotes a maximum distance between the inner edges of the outer edge seal portions 18 facing each other in the second direction D2, that is, an outer edge seal along the second edge portion 14 from the inner edge of the outer edge seal portion 18 along the first edge portion 13.
  • the maximum distance in the second direction D2 to the inner edge of the portion 18 is represented.
  • the maximum distance S ⁇ b> 2 is equal to the maximum distance in the second direction D ⁇ b> 2 between the inner edge of the first edge 13 and the inner edge of the second edge 14 of the flange portion 12.
  • the maximum distance S1 is smaller than the maximum distance S2.
  • the ratio of the maximum distance S2 to the maximum distance S1 is, for example, 1.0 or more and 1.8 or less, and may be 1.3 or more and 1.6 or less.
  • the lid 20 is configured by folding back at a folding portion 25 so that a part of a sheet material (hereinafter also referred to as lid material) for producing the lid 20 overlaps.
  • lid material a sheet material
  • the portion where the lid member 50 folded back by the folding portion 25 overlaps is referred to as a palm portion 23.
  • the palm portion 23 is formed from the edge on one side of the lid 20 (the edge on the third edge 15 side of the flange 12) to the edge on the other side (the fourth edge of the flange 12). To the edge of the portion 16 side) in the first direction D1.
  • the first direction D1 in which the palm portion 23 extends is a direction parallel to the conveyance direction T in which the bottom material and the lid material for forming the main body 10 and the lid 20 are conveyed in the manufacturing process of the container 1. It is.
  • the lid portion 20 includes the above-described joint portion 23 and a first lid portion 21 and a second lid portion 22 that are positioned so as to sandwich the palm portion 23 and are configured by the lid member 50.
  • the first lid portion 21 is positioned closer to the first edge 13 than the palm portion 23 in the second direction D2
  • the second lid portion 22 is a second edge portion than the palm portion 23 in the second direction D2. It is located on the 14th side.
  • a portion of the lid member 50 constituting the palm portion 23 that is located closer to the first lid portion 21 than the folded portion 25 is referred to as a first portion 27 and is closer to the second lid portion 22 than the folded portion 25.
  • the portion located at is also referred to as the second portion 28. As shown in FIG.
  • the first portion 27 and the second portion 28 are integrally configured via a folded portion 25.
  • the first portion 27 and the first lid portion 21 of the palm portion 23 are also integrally formed, and the second portion 28 and the second lid portion of the palm portion 23 are integrally formed. 22 is also integrally formed.
  • the palm portion 23 includes a palm seal portion 24 and a steaming portion 30 formed on the palm seal portion 24.
  • the joint seal portion 24 has an edge on one side (an edge on the third edge 15 side of the flange 12) to an edge on the other side (an edge on the fourth edge 16 side of the flange 12). ) Is a seal portion in which a part of inner surfaces of the lid member 50 are joined so as to extend in the first direction D1.
  • the steaming part 30 includes, for example, a through-hole 31 formed in the joint seal part 24 so as to penetrate the joint part 23. In the example shown in FIG. 1, the through hole 31 has a shape extending linearly along the first direction D1.
  • the through hole 31 has a shape extending linearly, the dimension of the through hole 31 in the direction orthogonal to the first direction D1 can be reduced. For this reason, the width
  • FIG. 2A the example in which the through hole 31 penetrates both the first portion 27 and the second portion 28 of the palm portion 23 is shown, but the present invention is not limited to this. What is necessary is just to penetrate at least one of the 1st part 27 and the 2nd part 28 of the palm part 23.
  • FIG. 2B the through hole 31 does not need to penetrate the first portion 27 though the second portion 28 penetrates.
  • the through hole 31 may penetrate the first portion 27 but may not penetrate the second portion 28.
  • the container 1 is packed as compared with the case of penetrating both the first part 27 and the second part 28. It is possible to prevent the through-hole 31 of one container 1 from being caught in the through-hole 31 of another container 1 when stacking or stacking. Moreover, it is possible to suppress contamination of germs and the like from the through hole 31 into the container 1.
  • the palm portion 23 may extend in the first direction D ⁇ b> 1 on the first edge portion 13 side from the center point 101 ⁇ / b> C of the housing portion 101 of the main body portion 10. In other words, the palm portion 23 does not have to overlap the center point 101C of the housing portion 101 of the main body portion 10 in plan view. Although not shown, the palm portion 23 may extend in the first direction D1 so as to overlap the center point 101C of the accommodating portion 101 of the main body portion 10 in plan view.
  • the symbol L1 represents the maximum distance in the second direction D2 between the center point 101C of the housing portion 101 of the main body portion 10 and the inner edge of the outer edge seal portion 18 along the first edge portion 13.
  • the symbol L2 represents the maximum distance in the second direction D2 between the base portion 26 of the palm portion 23 and the inner edge of the outer edge seal portion 18 along the first edge portion 13.
  • the maximum distance L2 is smaller than the maximum distance L1.
  • the maximum distance L2 is equal to the maximum distance L1.
  • the palm portion 23 is preferably separated from the center point 101 ⁇ / b> C of the housing portion 101 of the main body portion 10.
  • the palm portion 23 is too far from the center point 101 ⁇ / b> C of the housing portion 101 of the main body portion 10, it becomes difficult to apply pressure to the palm seal portion 24 around the steaming portion 30.
  • L2 / L1 is preferably 0.3 or more and 0.8 or less, and more preferably 0.3 or more and 0.6 or less.
  • the bottom material 40 includes at least a first base material 41.
  • the 1st base material 41 When producing the main-body part 10 by a sheet molding method, as a material which comprises the 1st base material 41, unstretched plastic films, such as unstretched polypropylene and unstretched nylon, can be used.
  • the 1st base material 41 may be comprised from the single layer, as shown in FIG. 3, and may contain the some layer as shown in FIG.
  • the first base material 41 is a coextruded sheet including a first layer 41a made of polypropylene, a second layer 41b made of EVOH or nylon, and a third layer 41c made of polypropylene.
  • EVOH is an ethylene-vinyl alcohol copolymer. As shown in FIG.
  • the bottom material 40 may further include a thermoplastic resin layer 42 positioned on the inner surface 40 x side with respect to the first base material 41.
  • a thermoplastic resin layer 42 for example, an unstretched polypropylene film, polyethylene, a resin blended with these, and the like can be used.
  • the thickness of the sheet material is, for example, 150 ⁇ m or more and 800 ⁇ m or less.
  • the bottom material 40 may be composed of a sheet material including a first base material 41 including a stretched plastic film that is stretched at least uniaxially, preferably biaxially, and a thermoplastic resin layer 42. .
  • the bottom material 40 may further include a second base material 43 positioned between the first base material 41 and the thermoplastic resin layer 42.
  • the layer structure of the bottom member 40 shown in FIG. 6 the same layer structure as that of the lid member 50 described later can be used.
  • the sheet material constituting the bottom material 40 includes the first base material 41 including the stretched plastic film and the thermoplastic resin layer 42
  • the thickness of the sheet material is, for example, 60 ⁇ m or more and 200 ⁇ m or less.
  • the sheet molding method is a method of forming a desired shape on a sheet by pressing a mold after heating and softening the sheet material. Vacuum forming, pressure forming, vacuum pressure forming, press forming and the like can be used. In addition, you may produce the main-body part 10 by other methods, such as an injection molding method.
  • the lid member 50 includes at least a first base material 51 and a thermoplastic resin layer 53.
  • FIG. 7 shows an example in which the lid member 50 includes a first base material 51, a print layer 52, and a thermoplastic resin layer 53.
  • the first base material 51 constitutes the outer surface 50 y of the lid member 50.
  • the thermoplastic resin layer 53 constitutes the inner surface 50 x of the lid member 50.
  • the print layer 52 can be provided between the first base material 51 and the thermoplastic resin layer 53, and can be provided on the surface on the inner surface 50 x side of the first base material 51.
  • the inner surface 50x is a surface located on the accommodating portion 101 side in the lid portion 20, and the outer surface 50y is a surface located on the opposite side of the inner surface 50x.
  • the first base material 51 has a certain rigidity so as to prevent the lid 20 from extending when the container 1 is opened.
  • the first substrate 51 includes a stretched plastic film that is at least uniaxially stretched, preferably biaxially stretched.
  • a stretched plastic film for example, polyamide such as nylon (ONy) or polyester such as polyethylene terephthalate (PET) or polybutylene terephthalate (PBT) can be used.
  • These stretched plastic films may be configured as a gas barrier film provided with a transparent vapor deposition layer.
  • the stretched plastic film included in the first substrate 51 is preferably stretched along the first direction D1.
  • the angle formed by the stretching direction of the stretched plastic film included in the first substrate 51 and the first direction D1 is preferably 45 degrees or less, more preferably 30 degrees or less, and 20 degrees or less. More preferably.
  • the thickness of the stretched plastic film of the first substrate 51 is appropriately set according to the material used.
  • the thickness of the stretched plastic film of the first base material 51 is 9 ⁇ m or more and 50 ⁇ m or less, preferably 12 ⁇ m or more and 25 ⁇ m or less.
  • the stretched plastic film refers to a film having a tensile elongation of less than 300%, preferably 200% or less when measured according to JIS K 7127.
  • the printed layer 52 of the lid member 50 is a layer printed on the first base material 51 in order to show product information or impart aesthetics to the container 1.
  • the print layer 52 expresses characters, numbers, symbols, figures, patterns, and the like.
  • ink for gravure printing or ink for flexographic printing can be used as a material constituting the printing layer 52.
  • the ink constituting the printing layer 52 includes a binder and a pigment.
  • the binder includes, for example, polyurethane.
  • Polyurethane is a cured product produced by a reaction between a polyol as a main agent and an isocyanate compound as a curing agent.
  • the thermoplastic resin layer 53 is a layer that forms a seal part such as the outer edge seal part 18 or the joint seal part 24 by melting.
  • a material constituting the thermoplastic resin layer 53 one or more resins selected from polyethylene such as low density polyethylene and linear low density polyethylene, and polypropylene can be used.
  • the thermoplastic resin layer 53 can be an unstretched film.
  • An unstretched film refers to a film having a tensile elongation of 300% or more, preferably 400% or more as measured according to JIS K 7127.
  • the thermoplastic resin layer 53 may be a single layer or a multilayer.
  • the thickness of the thermoplastic resin layer 53 is, for example, 30 ⁇ m or more and 100 ⁇ m or less.
  • the adhesive resin layer includes low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polyethylene such as a copolymer with ethylene- ⁇ olefin polymerized using a metallocene catalyst, and ethylene-vinyl acetate. Copolymers, ethylene-acrylic acid copolymers, ethylene-ethyl acrylate copolymers, ethylene-methacrylic acid copolymers, ethylene-methyl methacrylate copolymers, ethylene-maleic acid copolymers, etc.
  • One or more resins selected from saturated carboxylic acid copolymers and ionomer resins can be used in combination.
  • An adhesive agent is produced
  • an adhesive contains the hardened
  • the main agent include a polyol
  • the ether-based two-component reactive adhesive include polyether polyurethane.
  • the polyether polyurethane is a cured product produced by a reaction between a polyether polyol as a main agent and an isocyanate compound as a curing agent.
  • the ester-based two-component reactive adhesive include polyester polyurethane and polyester.
  • Polyester polyurethane is a cured product produced by a reaction between a polyester polyol as a main agent and an isocyanate compound as a curing agent. Moreover, you may use an acrylic polyol as a main ingredient.
  • the lid member 50 may further include a second base material 54 located between the first base material 51 and the thermoplastic resin layer 53.
  • the second base material 54 is located between the print layer 52 provided on the first base material 51 and the thermoplastic resin layer 53.
  • the second base material 54 like the first base material 51, preferably includes a stretched plastic film that is at least uniaxially stretched, preferably biaxially stretched.
  • a stretched plastic film As a material constituting the stretched plastic film, the same material as the first base material 51 can be used.
  • the stretched plastic film included in the second base material 54 is also preferably stretched along the first direction D1 in the same manner as the stretched plastic film of the first base material 51.
  • the angle formed by the stretching direction of the stretched plastic film contained in the second substrate 54 and the first direction D1 is preferably 45 degrees or less, more preferably 30 degrees or less, and 20 degrees or less. More preferably.
  • polyethylene terephthalate can be used as the material constituting the stretched plastic film of the first substrate 51
  • nylon is used as the material constituting the stretched plastic film of the second substrate 54.
  • the thickness of the stretched plastic film of the first substrate 51 is, for example, 9 ⁇ m or more and 50 ⁇ m or less, preferably 12 ⁇ m or more and 25 ⁇ m or less
  • the thickness of the stretched plastic film of the second substrate 54 is, for example, 9 ⁇ m or more and 50 ⁇ m or less, preferably 15 ⁇ m or more and 25 ⁇ m or less.
  • the above-described adhesive resin layer or adhesive is provided between the first base material 51 and the second base material 54 provided with the printing layer 52 and between the second base material 54 and the thermoplastic resin layer 53.
  • An adhesive layer may be provided.
  • the lid member 50 may further include an intermediate layer 55 located between the first base material 51 and the thermoplastic resin layer 53.
  • the intermediate layer 55 is located between the print layer 52 provided on the first base material 51 and the thermoplastic resin layer 53.
  • the intermediate layer 55 includes, for example, a gas barrier layer.
  • a gas barrier layer for example, a vapor deposition layer of a metal oxide such as aluminum oxide or an inorganic oxide such as silicon oxide can be provided.
  • a resin layer having a high gas barrier property such as an ethylene-vinyl alcohol copolymer (EVOH), a polyvinylidene chloride resin (PVDC), or an aliphatic polyamide such as nylon MXD6 may be provided as the gas barrier layer. .
  • EVOH ethylene-vinyl alcohol copolymer
  • PVDC polyvinylidene chloride resin
  • nylon MXD6 aliphatic polyamide
  • the thickness of the intermediate layer 55 is not less than 12 ⁇ m and not more than 25 ⁇ m, for example.
  • the palm seal portion 24 around the steaming portion 30 is peeled off before the outer edge seal portion 18, and the steam escapes from the steaming portion 30 to the outside.
  • the palm seal portion 24 has an easy peel property.
  • the seal strength of the palm seal portion 24 is lower than the seal strength of the outer edge seal portion 18.
  • FIG. 10 is a view showing a first test piece 61 for measuring the seal strength of the joint seal part 24.
  • the first test piece 61 cuts out a portion including the first lid portion 21, the second lid portion 22, and the palm portion 23 in the lid portion 20, as indicated by a one-dot chain line marked with a symbol X in FIG. 1.
  • FIG. 11 is a view showing a second test piece 62 for measuring the seal strength of the outer edge seal portion 18.
  • the second test piece 62 includes a body portion 11, a flange portion 12, and a lid portion 20 joined to the flange portion 12 in the container 1, as shown by a one-dot chain line frame denoted by XI in FIG. 1. Is obtained by cutting out
  • the width W (see FIG. 1) of the seal portion in the first test piece 61 and the second test piece 62 is 15 mm.
  • FIG. 12 is a diagram for explaining a method of measuring the seal strength of the joint seal portion 24 using the first test piece 61.
  • unjoined portions here, the first lid portion 21 and the second lid portion 22
  • the gripping tools 71 and 72 are pulled in opposite directions at a speed of 300 mm / min, and the maximum value of the tensile stress (see FIG. 13) is measured.
  • the direction in which the gripping tools 71 and 72 are pulled is orthogonal to the surface direction of the portion of the first test piece 61 joined by the palm seal portion 24.
  • FIG. 13 is a diagram showing changes in tensile stress with respect to the spacing S.
  • FIG. 13 is a diagram showing changes in tensile stress with respect to the spacing S.
  • the maximum value of the tensile stress is measured for the three first test pieces 61, and the average value is taken as the seal strength of the palm seal portion 24.
  • the spacing S between the gripping tools 71 and 72 when starting to pull is 20 mm, and the spacing S between the gripping tools 71 and 72 when finishing pulling is 40 mm.
  • the method of measuring the seal strength of the outer edge seal portion 18 using the second test piece 62 is the same as the method of measuring the seal strength of the palm seal portion 24. Specifically, first, the lid 20 of the second test piece 62 is gripped by one of the grippers 71 and 72, and the body 11 of the second test piece 62 is gripped by the other of the grippers 71 and 72. Subsequently, the gripping tools 71 and 72 are respectively pulled in directions opposite to each other at a speed of 300 mm / min, and the maximum value of the tensile stress is measured. The maximum value of the tensile stress is measured for the three second test pieces 62, and the average value is taken as the seal strength of the outer edge seal portion 18.
  • the seal strength of the outer edge seal portion 18 in an environment of a temperature of 25 ° C. and a relative humidity of 50% is, for example, 10 N or more, and more preferably 15 N or more. Further, the seal strength of the joint seal portion 24 in an environment of a temperature of 25 ° C. and a relative humidity of 50% is lower than the seal strength of the outer edge seal portion 18, for example, 12 N or less, and more preferably 10 N or less.
  • the seal strength of the outer edge seal portion 18 at 100 ° C. is, for example, 3.0 N or more. Further, the seal strength of the joint seal portion 24 at 100 ° C. is lower than the seal strength of the outer edge seal portion 18, for example, 8.0 N or less, and more preferably 2.5 N or less.
  • FIGS. 14A to 14D a process of manufacturing the lid 20 using the lid 50 will be described.
  • a lid member 50 is prepared.
  • the lid member 50 is folded back by the folding portion 25 so that a part of the lid member 50 overlaps to form the palm portion 23.
  • the step of folding back the lid member 50 is performed while the lid member 50 is transported in the transport direction T.
  • the palm seal portion 24 is formed by joining the inner surfaces of a part of the lid member 50 at the palm portion 23.
  • the palm seal portion 24 extending along the transport direction T is formed by clamping the palm portion 23 of the lid member 50 transported in the transport direction T while being heated by a pair of seal rollers.
  • the joint seal portion 24 is provided with the joint portion 23 and the through hole 31 penetrating the joint seal portion 24 along the transport direction T of the lid portion 20 in the first direction D1 described above. It is formed with a period corresponding to the dimension. For example, a cutting blade having a shape corresponding to the through hole 31 is pierced into the palm portion 23. In this manner, the lid portion 20 including the steaming portion 30 including the through hole 31 formed in the palm seal portion 24 of the palm portion 23 can be manufactured.
  • the main body 10 can be manufactured by forming the bottom material 40 using a sheet forming method such as vacuum forming, pressure forming, or vacuum / pressure forming.
  • a sheet forming method such as vacuum forming, pressure forming, or vacuum / pressure forming.
  • the process of manufacturing the main body 10 by the plug assist molding method will be described.
  • the male mold 81 is disposed on the inner surface 40x side of the bottom member 40, and the female mold 82 is disposed on the outer surface 40y side.
  • the male mold 81 is relatively moved toward the female mold 82, and the bottom material 40 is pushed into the recess of the female mold 82.
  • drum 11 can be formed in the bottom material 40.
  • the bottom material 40 may be fixed using a pressing plate 83 in order to prevent the bottom material 40 from being stretched at a portion other than the body portion 11.
  • the space on the side where the female mold 82 is located may be in a vacuum state having a pressure lower than the atmospheric pressure.
  • the outer surface 40y of the bottom material 40 can be brought into close contact with the female mold 82, and the bottom material 40 can be accurately molded.
  • the pressure is preferably 0.05 atm (0.05 ⁇ 10 5 Pa) or more and 0.3 atm (0.3 ⁇ 10 5 Pa) or less.
  • the space on the side where the male mold 81 is located may be in a compressed air state having a pressure higher than the atmospheric pressure.
  • the outer surface 40y of the bottom material 40 can be brought into close contact with the female mold 82, and the bottom material 40 can be accurately molded.
  • the pressure is preferably 1.5 atm (1.5 ⁇ 10 5 Pa) or more and 5 atm (5.0 ⁇ 10 5 Pa) or less.
  • FIG. 16 the contents 5 are filled into the body 11.
  • drum 11 is in the open state over the whole region, the content 5 can be easily filled into the trunk
  • the trunk portion 11 filled with the contents 5 is covered with a lid portion 20.
  • the lid portion 20 is joined to the flange portion 12 that spreads outward from the upper portion of the body portion 11 using the joining device 85 to form the outer edge seal portion 18.
  • the lid portion 20 and the flange portion 12 are cut at the outer edge seal portion 18.
  • the container 1 including the main body 10 having the body 11 and the flange 12 and the lid 20 joined to the flange 12 and containing the contents 5 can be obtained.
  • the palm portion 23 of the lid portion 20 is formed by folding back a portion of the lid member 50 for constituting the lid portion 20 by the folding portion 25. For this reason, the efficiency of the process of forming the palm portion 23 can be improved as compared with the case where the palm portion 23 is formed by superimposing two lid members. Moreover, it can be suppressed by the folding
  • the palm portion 23 is configured such that the palm portion 23 is separated from the center point 101C of the housing portion 101 of the main body portion 10, so that the third edge 15 on the flange portion 12 or the fourth edge is formed. It is possible to prevent the joint seal part 24 or the outer edge seal part 18 on the part 16 from peeling off before the joint seal part 24 around the steaming part 30. Also by this, it can suppress that a vapor
  • the palm portion 23 is configured so that the palm portion 23 is separated from the center point 101C of the housing portion 101 of the main body portion 10, thereby overlapping the center point 101C of the housing portion 101 of the main body portion 10.
  • a simple print display can be given to the lid 20 by the print layer 52. Thereby, the visibility and design property of the printed display of the cover part 20 can be improved.
  • the bottom portion 11a and the flange portion 12 of the main body portion 10 have a substantially rectangular outline
  • the present invention is not limited to this.
  • the bottom part 11a and the flange part 12 may have circular outlines, such as an ellipse.
  • the palm portion 23 of the lid portion 20 has an edge portion (flange portion) on one side from the edge portion on one side of the lid portion 20 (edge portion on the third edge portion 15 side of the flange portion 12). 12 to the fourth edge 16 side edge) in the first direction D1.
  • the maximum distance S2 in the second direction D2 may be larger than the maximum distance S1 in the first direction D1, as in the case of the above-described embodiment.
  • the palm portion 23 may be located closer to the first edge portion 13 than the center point 101C of the housing portion 101 of the main body portion 10.
  • the maximum distance S2 of the storage unit 101 in the second direction D2 is larger than the maximum distance S1 of the storage unit 101 in the first direction D1 is shown, but the present invention is not limited thereto.
  • the maximum distance S2 of the accommodating portion 101 in the second direction D2 may be equal to the maximum distance S1 of the accommodating portion 101 in the first direction D1.
  • the bottom part 11a and the flange part 12 of the main body part 10 may have a substantially square outline.
  • the palm portion 23 may be located closer to the first edge portion 13 than the center point 101 ⁇ / b> C of the housing portion 101 of the main body portion 10.
  • the through hole 31 of the steaming portion 30 has a shape extending linearly along the first direction D1
  • the present invention is not limited to this, and as shown in FIG. 20, the through hole 31 of the steaming section 30 may have a wavy shape that undulates in a direction orthogonal to the first direction D1. In this case, it becomes easier to pierce the palm portion 23 with a cutting blade having a shape corresponding to the through hole 31.
  • the steaming part 30 may include a notch 32 formed in the joint seal part 24 in the folded part 25 of the joint part 23.
  • the notch 32 may have a triangular shape as shown in FIG. 23, and may have a semicircular shape as shown in FIG.
  • the notch 32 has a shape that tapers from the folded portion 25 side toward the base portion 26 side.
  • the first embodiment will be described more specifically by way of examples.
  • the first embodiment is not limited to the description of the following examples unless it exceeds the gist.
  • the lid member 50 constituting the lid part 20 a laminated body having the same layer configuration as the lid member 50 shown in FIG. 9 was prepared except that the print layer 52 was not provided.
  • the first substrate 51 a 12- ⁇ m thick biaxially stretched PET film provided with a transparent vapor deposition layer was used.
  • the second substrate 54 a stretched nylon film having a thickness of 15 ⁇ m was used.
  • the thermoplastic resin layer 53 an easy peel sealant film was used.
  • a part of the lid member 50 was folded back, and the folded part was heated to form a palm portion 23 and a palm seal portion 24 having a width of 8 mm.
  • a through-hole 31 having a length of 10 mm extending linearly along the direction in which the palm portion 23 extends was formed at a position 4 mm away from the base portion 26 of the palm portion 23.
  • an outer edge seal portion 18 that joins the lid portion 20 to the flange portion 12 of the main body portion 10 is formed, and the container 1 in which water is stored is obtained.
  • the outer edge seal portion 18 was in contact with the inner edge of the flange portion 12, and the width of the outer edge seal portion 18 was 7 mm.
  • the main body portion 10 and the lid portion 20 are combined so that the extending direction of the palm portion 23 of the lid portion 20 is parallel to the first direction D1 which is the direction of the maximum distance S1 of the main body portion 10.
  • Example A2 Except that the lid portion 20 is configured so that the ratio of the maximum distance L1 to the maximum distance L1 is 1.0, five each of four types of substantially rectangular containers 1 in the same manner as in the case of Example A1. Produced. Further, in the same manner as in Example A1, whether or not the outer edge seal portion 18 between the flange portion 12 and the lid portion 20 was peeled was confirmed. The results are shown in FIG.
  • Example A3 As the bottom material 40, using a first substrate 41 made of a co-extruded sheet having a thickness of 400 ⁇ m including a first layer 41a made of polypropylene, a second layer 41b made of EVOH, and a third layer 41c made of polypropylene.
  • the main body 10 was produced in the same manner as in Example A1. S2 / S1 was set to 1.3. The depth H of the main body 10 was 30 mm.
  • Example A1 the same lid 20 as in Example A1 was produced. Subsequently, after filling the storage portion 101 of the main body portion 10 with 100 g of water, an outer edge seal portion 18 that joins the lid portion 20 to the flange portion 12 of the main body portion 10 is formed, and the container 1 in which water is stored is obtained. Produced. At this time, five types of containers 1 each having L2 / L1 of 0.2, 0.4, 0.6, 0.8, or 1.0 were prepared. Subsequently, in the same manner as in Example A1, it was confirmed whether or not the outer edge seal portion 18 between the flange portion 12 and the lid portion 20 was peeled off. The results are shown in FIG.
  • Example A4 A first test piece 61 and a second test piece 62 were cut out from the container 1 shown in Example A3. Subsequently, the seal strength of the palm seal portion 24 is measured using the first test piece 61 and the seal strength of the outer edge seal portion 18 using the second test piece 62 by the measurement method shown in FIGS. 12 and 13. Was measured. The measurement was performed in an environment of 25 ° C. and 100 ° C., respectively. In the measurement under the environment of 100 ° C., the measurement was started two minutes after the temperature of the constant temperature bath RTC-1310A with constant temperature bath manufactured by Orientec Co., Ltd. reached 100 ° C. The measurement results at 25 ° C. are shown in FIG. 28, and the measurement results at 100 ° C. are shown in FIG.
  • the seal strength of the outer edge seal portion 18 at 25 ° C. was 15 N or more, and the seal strength of the palm seal portion 24 at 25 ° C. was 10 N or less. Further, the seal strength of the outer edge seal portion 18 at 100 ° C. was 3.0 N or more, and the seal strength of the palm seal portion 24 at 100 ° C. was 2.5 N or less. Thus, the seal strength of the joint seal portion 24 is lower than the seal strength of the outer edge seal portion 18, and therefore, it is expected that the peeling is more likely to proceed in the joint seal portion 24 than the outer edge seal portion 18.
  • containers packaging bodies that can cook food with a microwave while the food is contained in the container and can release steam by partially peeling the seal portion with the internal steam pressure are known (for example, actual packaging).
  • Examples See Kaihei 4-1179, JP-A 2004-268948, and WO 2007/020854).
  • an object of the present embodiment is to provide a container for microwave oven that is cooked using a microwave oven and has excellent usability.
  • a container for a microwave oven covers a main body portion including a trunk portion that defines a housing portion, a flange portion provided around the upper portion of the trunk portion, and a housing portion of the main body portion. And a lid portion joined to the flange portion. Between the flange portion and the lid portion, an outer edge seal portion is provided over the entire circumference.
  • the lid portion has a palm portion where the inner surfaces face each other.
  • the palm portion includes two first palm seal portions extending from the flange portion toward the tip of the palm portion, and a second palm seal portion positioned between the two first palm seal portions.
  • the axis that becomes the minimum distance when connecting the two points of the outer edge of the outer edge seal portion through the center of the housing portion is the A axis, and the two points of the outer edge of the outer edge seal portion are perpendicular to the A axis through the center of the housing portion
  • the axis connecting the two is the B-axis
  • the length of the A-axis is shorter than the length of the B-axis
  • the palm portion crosses the accommodating portion and is provided along the B-axis.
  • a steaming part is provided in the second joint seal part.
  • the palm portion is provided along the B-axis, it is stable from the steaming portion of the second palm seal portion provided in the palm portion when cooked using a microwave oven. Then, the steam can escape. Thereby, since it is possible to suppress the escape of steam through the first joint seal part or the outer edge seal part, it is possible to suppress the leakage of the contents.
  • FIG. 30 is an external perspective view showing the container 1 for a microwave oven according to one embodiment of the present invention.
  • 31A to 31C are a plan view and a cross-sectional view of the microwave oven container 1 according to the embodiment.
  • 31A is a plan view
  • FIG. 31B is a sectional view taken along line XXXIB-XXXIB in FIG. 31A
  • FIG. 31C is a sectional view taken along line XXXIC-XXXIC in FIG. 31A.
  • the same parts as those in the first embodiment may be denoted by the same reference numerals and detailed description thereof may be omitted.
  • the description thereof may be omitted.
  • the lid portion 20 has a palm portion 23 and a palm seal portion 24. Between the flange portion 12 and the lid portion 20 of the main body portion 10, an outer edge seal portion 18 is formed over the entire circumference. In FIG. 30 and FIGS. 31A to 31C, a region to be the outer edge seal portion 18 and a region to be the palm seal portion 24 are shaded.
  • an outer edge seal portion 18 is formed between the lid portion 20 and the flange portion 12.
  • the outer edge seal portion 18 is formed by heat-sealing the sealant layer of the lid portion 20 and the flange portion 12.
  • the outer edge seal portion 18 is formed over the entire area of the flange portion 12.
  • the width 18W of the outer edge seal portion 18 is not particularly limited, but is preferably 3 mm or more and 7 mm or less. When the width W of the outer edge seal portion 18 is less than 3 mm, there is a high possibility that the content will leak due to peeling when pressure is applied to the housing portion 101. Moreover, when the width W of the outer edge seal part 18 exceeds 7 mm, there is a problem that the user does not easily peel when trying to open the seal.
  • the palm portion 23 is formed so that the inner surfaces of the lid portion 20 face each other.
  • the lid portion 20 of the present embodiment is composed of a single film, and as shown in FIG. 31B, the film is folded at the distal end 23a of the palm portion 23 so that the film is continuous.
  • the joint seal portion 24 is obtained by sealing the thermoplastic resin layers 53 of the lid 50.
  • 31B and 31C indicate the length from the tip 23a of the palm portion 23 to the base portion 26 of the palm portion 23.
  • the palm seal portion 24 includes a first palm seal portion 24a, 24b located on the flange portion 12 of the main body 10 and a first palm seal portion 24a, 24b located between the two first palm seal portions 24a, 24b.
  • the second joint seal portion 24c is formed between one first joint seal portion 24a and the other first joint seal portion 24b. That is, there is no unsealed portion in the palm portion 23.
  • the boundary between the first joint seal portion 24a and the second joint seal portion 24c, and the boundary between the first joint seal portion 24b and the second joint seal portion 24c are indicated by alternate long and short dash lines.
  • the first palm seal portions 24a and 24b and the second palm seal portion 24c are formed from the base portion 26 of the palm portion 23 to the tip 23a.
  • a axis and B axis for specifying the direction of the palm portion are defined.
  • the A axis indicated by the symbol A is an axis that passes through the center of the housing portion 101 and becomes the minimum distance when connecting the two points of the outer edge of the outer edge seal portion 18.
  • a B-axis indicated by a symbol B is an axis connecting two points of the outer edge of the outer edge seal portion 18 so as to pass through the center of the housing portion 101 and to be orthogonal to the A-axis.
  • the A axis is shorter than the B axis.
  • the ratio of the B-axis length to the A-axis length is preferably 1.2 to 3.0, and more preferably 1.4 to 2.0.
  • the palm portion 23 is provided so as to pass through the center of the accommodating portion 101 and to be positioned on the B axis. That is, the palm portion 23 is parallel to the B axis. However, the palm portion 23 does not necessarily have to be on the B axis or parallel to the B axis, and may be formed along the B axis. “Form along the B axis” means that the angle formed with the B axis is 0 ° or more and less than 45 °. The palm portion 23 is preferably formed with an angle of 10 ° or less with the B axis. In the embodiment, as shown in FIG.
  • the palm portion 23 is formed to extend from one short side portion 122 of the flange portion 12 to the other short side portion 122 opposed thereto.
  • the direction in which the short side portion 122 extends and the direction in which the palm portion 23 extends are orthogonal to each other.
  • the steaming part 30 is provided in the second palm seal part 24c.
  • the steaming part 30 includes a V-shaped through hole 31.
  • the V-shaped through hole 31 is arranged so that the apex faces the main body 10 side.
  • the through hole 31 is preferably formed at a position 2 mm to 5 mm away from the base 26 of the palm portion.
  • the through hole 31 is preferably formed at a position close to the center of the housing portion from the viewpoint of stably removing steam from the through hole 31, and is far from the center of the housing portion from the viewpoint of enhancing the steaming effect. It is preferable to form at a position.
  • the material of the lid member 50 constituting the lid portion 20 shown in FIGS. 31A to 31C will be described.
  • the lid member 50 includes at least a first base material 51 and a thermoplastic resin layer 53.
  • a polyester resin such as polyethylene terephthalate, a polyamide resin such as nylon (Ny), polypropylene, or the like can be used.
  • the first substrate 51 is preferably biaxially stretched.
  • the mixed resin containing one resin and one resin and an incompatible resin can be used.
  • a mixed resin of polypropylene and polyethylene, a mixed resin of polyethylene and polybutene, or the like can be used as the mixed resin.
  • the thermoplastic resin layer 53 is a layer that becomes the innermost layer of the lid member 50.
  • first base material 51 and the thermoplastic resin layer 53 include polypropylene, biaxially stretched polypropylene is used for the first base material 51, and unstretched polypropylene is used for the thermoplastic resin layer 53.
  • first base materials 51 may be provided in the lid member 50.
  • the lid member 50 may include other layers other than the first base material 51 and the thermoplastic resin layer 53. The other layer may be provided outside the first base material 51, or may be provided between the first base material 51 and the thermoplastic resin layer 53. Examples of other layers include a barrier layer.
  • Barrier layers include metal oxides such as aluminum oxide and inorganic oxides such as silicon oxide, ethylene-vinyl alcohol copolymer (EVOH), polyvinylidene chloride resin (PVDC), and aromatics such as nylon MXD6.
  • a resin layer having gas barrier properties such as polyamide can be provided.
  • Each layer can be laminated using a dry lamination method, a melt extrusion method, or the like.
  • FIG. 32A and 32B are views showing the main body 10 constituting the microwave oven container 1 according to the present embodiment.
  • 32A is a plan view
  • FIG. 32B is a sectional view taken along line XXXIIB-XXXIIB in FIG. 32A.
  • the flange portion 12 of the main body portion 10 includes two long side portions 121 facing each other and two short side portions 122 facing each other.
  • the contour of the outer edge of the flange portion 12 is rectangular.
  • the outline of the inner edge of the flange part 12 is a rectangular shape.
  • the C-axis is an axis that passes through the center of the housing portion 101 and becomes the minimum distance when connecting the two points on the inner edge of the flange portion 12.
  • the D axis is an axis that connects two points on the inner edge of the flange portion 12 so as to pass through the center of the housing portion 101 and to be orthogonal to the C axis.
  • the D axis is longer than the C axis.
  • the C axis is located on the same straight line as the A axis shown in FIG. 31A.
  • the D axis is located on the same straight line as the B axis.
  • An E axis indicated by a symbol E is an axis that passes through the center of the housing portion 101 and is the minimum distance when connecting two points on the outer edge of the flange portion 12.
  • the F-axis indicated by the symbol F is an axis that connects two points on the inner edge of the flange portion 12 so as to pass through the center of the housing portion 101 and to be orthogonal to the E-axis.
  • the F axis is longer than the E axis.
  • the E axis is located on the same straight line as the C axis and the A axis.
  • the F-axis is located on the same straight line as the D-axis and the B-axis.
  • the C axis and the E axis are located on the same straight line, and the D axis and the F axis are located on the same straight line, in FIG. 32A, due to the difference in the arrow shape at both ends of the axis, the C axis, the E axis, and the D axis
  • the difference between the lengths of the F-axis is shown for easy understanding.
  • the C axis and D axis are indicated by solid lines, and the E axis and F axis are indicated by broken lines.
  • the length of the D axis relative to the length of the C axis is not particularly limited as long as the length of the C axis is shorter than the D axis, but is preferably 1.2 to 3.0, more preferably 1.4 to 2.0. preferable.
  • the trunk portion 11 includes a side portion 11b and a bottom portion 11a.
  • the bottom 11a has a rectangular shape.
  • a side portion 11b is erected from the periphery of the bottom portion 11a.
  • the flange portion 12 is connected to the upper edge of the side portion 11b and extends in the horizontal direction toward the outside.
  • G is the depth of the main body portion 10, that is, the depth of the accommodating portion 101, and indicates the distance along the vertical direction from the upper edge of the flange portion to the upper edge of the bottom portion 11a.
  • the main body 10 is formed using a thermoplastic resin such as polyolefin such as polypropylene (PP), polyethylene (PE), or polystyrene (PS).
  • the main body 10 can be molded by, for example, an injection molding method.
  • the thickness of the main body 10 is preferably in the range of 0.5 to 2.0 mm.
  • the contents contain moisture.
  • the contents include retort foods, frozen foods, and refrigerated foods.
  • the food include curry, rice cake, yakisoba, side dish, and fish. In these contents, since water evaporates with heating and the pressure of the container accommodating portion 101 increases, a steam venting function for releasing the steam in the accommodating portion 101 to the outside is required.
  • FIG. 33 is a plan view showing a container for a microwave oven of a comparative form. About the same location as embodiment, the same code
  • the comparative form is the same as that of the present embodiment except that the palm portion 23 is provided on the A axis. In the comparative form, the palm portion 23 is provided so as to pass through the center of the accommodating portion 101 and be positioned on the A axis, and the steaming portion 30 is provided in the second palm seal portion 24c. Also in the comparative form, the second joint seal portion 24c is formed between one first joint seal portion 24a and the other first joint seal portion 24b.
  • the first joint seal portions 24 a and 24 b and the second joint seal portion 24 c are formed from the base of the joint portion 23 to the tip. Also in the comparative form, the steaming part 30 is formed in the second joint seal part 24c and includes a V-shaped cut.
  • first joint seal portions 24 a and 24 b are formed in a state where the joint portion 23 of the lid portion 20 and the portion sealed to the flange portion 12 of the lid portion 20 overlap each other. That is, the four films are formed in an overlapped state. For this reason, the seal
  • FIG. 34 is a cross-sectional view showing the lid portion 20 in the modification, and corresponds to the cross-sectional view taken along the line XXXIB-XXXIB in FIG. 31A.
  • the palm portion 23 is configured by using one film, but in the modification shown in FIG. 34, the palm portion 23 is formed by using two films.
  • the steaming part 30 includes a through hole 31.
  • the example in which the steaming part 30 includes the through hole 31 is shown. Also good. In this case, by forming a portion with a narrow seal width in the vertical direction in a part of the second joint seal portion 24c, it is possible to act as the steaming portion 30.
  • FIGS. 35A to 35D are plan views showing modifications of the main body 10.
  • 35A to 35D four typical modifications are shown in FIGS. 35A to 35D as typical modifications.
  • all four corners of the inner edge of the flange portion 12 are chamfered to form an outwardly convex arc shape.
  • one corner of the inner edge of the flange portion 12 is chamfered and has an outwardly convex arc shape.
  • the upper right corner of the drawing is chamfered, but any other corner may be chamfered, or any two or three corners may be chamfered.
  • FIG. 35B the modification of FIG.
  • the four corners of the inner edge and the four corners of the outer edge of the flange portion 12 are all chamfered to form an outwardly convex arc shape.
  • an example in which the contours of the inner edge and the outer edge of the flange portion 12 are rectangular has been shown.
  • some or all of the corner portions are chamfered in the rectangular shape. It may be a convex arc.
  • the outline of the inner edge and the outline of the outer edge of FIGS. 35A to 35C are also included in the rectangular concept.
  • the inner edge and the outer edge of the flange part 12 are elliptical.
  • FIG. 36 is a plan view of the container 1 showing a modified example of the outer edge seal portion 18.
  • the palm portion 23 is omitted for convenience of explanation.
  • the outer edge seal portion 18 may not be provided over the entire width of the flange portion 12.
  • the width 18W of the outer edge seal portion 18 is not less than 3 mm and not more than 7 mm.
  • a part of the outer edge seal portion 18 (upper left in the drawing) includes a protruding seal portion 18a that protrudes outward.
  • the projecting seal portion 18a has a tapered shape.
  • FIG. 37 is a plan view of a container showing a modified example of the position of the palm portion 23.
  • the palm portion 23 is provided parallel to the B axis while traversing the accommodating portion 101, but is offset to one long side portion 121 side. In FIG. 37, it is offset to the long side portion 121 side on the upper side of the drawing. That is, the palm portion 23 is provided so as not to pass through the center of the container.
  • 38A and 38B are diagrams showing a modification of the seal form of the palm seal part.
  • 38A and 38B are views corresponding to FIG. 31C of the embodiment, but show only the palm portion 23 portion.
  • the sealed portions are shown shaded.
  • the two broken lines on the left and right across FIGS. 38A and 38B indicate the width of the corresponding flange portion 12.
  • trapezoidal non-seal portions 38 exist on the left and right sides below the second joint seal portion 24c.
  • the non-seal portion 38 is formed so as to include the base portion 26 of the palm portion 23.
  • the second palm seal portion 24c includes a convex portion on the lower side, and a V-shaped notch (through hole) is formed at a position corresponding to the convex portion of the second palm seal portion 24c.
  • a V-shaped notch through hole
  • the example in which the convex portion of the second palm seal portion 24c is triangular is shown, but the present invention is not limited to this.
  • the palm portion 23 is formed by two films as shown in FIG. Even if is configured, it is applicable.
  • the second palm is formed by a semicircular portion from the upper center side and a left and right rectangular portion that is formed so as to be separated from the semicircular portion and adjacent to the first palm seal portions 24a and 24b.
  • a seal portion 24c is configured.
  • a portion not shaded is a non-seal portion 38.
  • the non-seal portion 38 is formed so as to include the distal end 23 a and the base portion 26 of the palm portion 23.
  • the through-hole (cut) 31 that is the steaming portion 30 has a downwardly convex semicircular arc shape in accordance with the semicircular portion of the second palm seal portion 24c.
  • the semicircular arc-shaped through-holes (cuts) 31 that are the steaming portions 30 are all formed so as to be accommodated in the second palm seal portion 24c.
  • the joint portion 23 is formed by two films as shown in FIG. It is not applicable when is configured.
  • the joint seal portion 24 around the steaming portion 30 is peeled off before the outer edge seal portion 18 to cause steaming. It is preferable that the steam escapes from the passage portion 30 to the outside.
  • the joint seal portion 24 may have an easy peel property as in the case of the first embodiment.
  • the seal strength of the second palm seal portion 24 c of the palm seal portion 24 may be lower than the seal strength of the outer edge seal portion 18.
  • the seal strength of the outer edge seal portion 18 in an environment of a temperature of 25 ° C. and a relative humidity of 50% is, for example, 10 N or more, and more preferably 15 N or more. Further, the seal strength of the second joint seal portion 24c in an environment of a temperature of 25 ° C. and a relative humidity of 50% is lower than the seal strength of the outer edge seal portion 18, for example, 12N or less, and more preferably 10N or less.
  • the seal strength of the outer edge seal portion 18 at 100 ° C. is, for example, 3.0 N or more. Further, the seal strength of the second palm seal portion 24c at 100 ° C. is lower than the seal strength of the outer edge seal portion 18, for example, 8.0 N or less, and more preferably 2.5 N or less.
  • FIGS. 39A to 39D are diagrams showing modifications of the steaming unit 30.
  • FIG. 39A to 39D are diagrams corresponding to FIG. 31C of the embodiment, but for convenience of explanation, only the vicinity of the steaming unit 30 is extracted and shown.
  • the sealed portions are shaded.
  • the steaming part 30 includes a non-seal part 31a and a through hole 31, and the through hole 31 is formed in the non-seal part 31a.
  • the non-seal portion 31a has a rectangular shape, but may have a shape other than a rectangle.
  • FIG. 39A is a rectangular shape, but may have a shape other than a rectangle.
  • the steaming part 30 includes an I-shaped through hole (cut) 31 extending in the vertical direction.
  • the upper end of the through hole 31 reaches the tip 23 a of the palm portion 23.
  • a notch 32 is provided as the steaming part 30.
  • the shape of the notch 32 is a semicircular shape convex downward.
  • a notch 32 is provided as the steaming part 30.
  • the shape of the notch 32 is triangular. Further, a hole may be formed instead of the notch.
  • the main body 10 may be formed by using a sheet forming method such as a vacuum forming method or a pressure forming method.
  • a sheet forming method such as a vacuum forming method or a pressure forming method.
  • the main body 10 is manufactured by processing a plastic sheet by a deep drawing method that is a kind of sheet molding method, for example, a sheet in which PP, Ny, PP are sequentially laminated, LLDPE, Ny, A sheet in which LLDPEs are sequentially laminated can be used.
  • the thickness of the main body can be 100 to 500 ⁇ m.
  • the second embodiment will be described more specifically by way of examples.
  • the second embodiment is not limited to the description of the following examples unless it exceeds the gist.
  • Example B1 32A and 32B were molded by a sheet molding method using a 300 ⁇ m-thick coextruded sheet (PP / EVOH (ethylene-vinyl alcohol copolymer) / PP).
  • a laminated film in which a polyethylene terephthalate film having a thickness of 12 ⁇ m, a biaxially stretched polyamide film having a thickness of 15 ⁇ m, and an easy peel film having a thickness of 50 ⁇ m were sequentially laminated was prepared.
  • the V-shaped through-hole 31 which is the palm part 23, the palm seal part, and the steaming part 30 was formed using the laminated
  • the container shown in FIG. 30 was formed by filling the molded tray (main body part 10) prepared above with 100 g of water and then joining the lid part 20 to the main body part 10.
  • the length (L) from the tip 23a of the palm portion 23 to the base portion 26 of the palm portion 23 was set to 10 mm.
  • the palm portion 23 is located on the B axis.
  • the through-hole 31 which is the steaming part 30 is located on the center of the accommodating part 101.
  • the width of the outer edge seal portion 18 was 7 mm.
  • the distance from the base 26 of the palm portion 23 to the lower end of the through hole 31 was 3 mm.
  • Example B2 A container was produced in the same manner as in Example B1, except that the V-shaped through hole 31 was formed as the steaming part 30 at a position shifted by 30 mm in the horizontal direction.
  • Example B3 A container was produced in the same manner as in Example B1, except that the steaming part 30 was changed to an I-shaped through hole 31 extending in the vertical direction. The I-shaped cut was formed so as to reach the tip 23a of the palm portion 23.
  • Comparative Example B1 A container was fabricated in the same manner as in Example B1, except that the palm portion 23 was changed to be positioned on the A axis. That is, the container of Comparative Example B1 corresponds to the container shown in FIG.
  • Comparative Example B2 A container was produced in the same manner as in Comparative Example B1, except that the steaming part 30 was changed to an I-shaped cut extending in the vertical direction.
  • a deep-drawn container obtained by deep-drawing a laminate is known as disclosed in, for example, Japanese Patent Application Laid-Open No. 2006-232280.
  • the deep-drawing container includes a main body having a trunk formed by deep drawing and a flange extending outward from the upper portion of the trunk, and a lid joined to the flange. Further, the container is provided with a steaming section for discharging water vapor generated when the contents are heated by a microwave oven or the like to the outside.
  • a container of which the contents are heated by a microwave oven or the like various information such as images and characters representing products and images and characters explaining how to use are displayed by printing.
  • a portion of the container on which various information such as images and characters are printed is also referred to as a display unit.
  • the laminate for constituting the main body is greatly stretched. For this reason, if the display part is previously provided in the laminated body, the display part will be greatly distorted by deep drawing. Therefore, in a deep-drawn container, it is difficult to provide a display unit on the container side, and a display unit is provided on the lid. However, since the area of the display unit is largely limited only by the lid, it is desired that the main body unit can also be used as the display unit.
  • This embodiment is intended to provide a container that can effectively solve these problems and a method for manufacturing the same.
  • a container having an accommodating part for accommodating contents is a main body part having a trunk part defining the accommodating part and a flange part extending outward from the upper part of the trunk part, and a bottom material ( A lid part joined to the flange part of the main body part via an outer edge seal part so as to cover the housing part, and is constituted by a lid material (second laminated body). And a steaming portion configured to communicate the housing portion with the outside of the container when the pressure in the housing portion increases.
  • the bottom material has at least a thermoplastic resin layer constituting an inner surface located on the storage portion side, and a base material laminated on the thermoplastic resin layer.
  • the base material of the bottom material includes a stretched film.
  • a method for manufacturing a container having a storage portion that stores contents and having a vaporizing portion configured to communicate with the outside when the pressure of the storage portion increases is provided in the storage portion.
  • a bottom material first laminated body
  • the bottom material includes at least a thermoplastic resin layer that constitutes an inner surface located on the housing portion side, and a base material that is laminated on the thermoplastic resin layer.
  • the base material of the bottom material includes a stretched film.
  • a container including a main body provided with a display unit having excellent printability of the display unit.
  • FIG. 40 is a plan view showing the container 1 according to the present embodiment.
  • FIG. 41 is a cross-sectional view showing a case where the container 1 shown in FIG. 40 is viewed along the line XXXXI-XXXI.
  • the container 1 is provided with the main-body part 10, the cover part 20, and the steaming part 30 similarly to the case of 1st Embodiment.
  • the container 1 may further include an opening means 17 for facilitating opening the container 1 by tearing.
  • the same parts as those in the first embodiment may be denoted by the same reference numerals and detailed description thereof may be omitted.
  • the description thereof may be omitted.
  • the main body portion 10 is provided with a display portion 10 s that is visible when the main body portion 10 is viewed from the outer surface side of the bottom material (first laminated body) constituting the main body portion 10. .
  • the display unit 10s is a portion of the main body unit 10 on which various information such as images, graphics, pictures, characters, numbers, symbols, and the like are printed. Examples of the information include a product name, a raw material name of the product, a content, a shelf life, a storage method, a manufacturer, a seller, a nutritional ingredient display, a usage method, and handling precautions.
  • the layers constituting the display unit 10s are included in the bottom material itself.
  • the lid 20 may also be provided with a display unit.
  • reference numeral S31 represents the dimension of the container 1 in the first direction D1
  • reference numeral S32 represents the dimension of the container 1 in the second direction D2.
  • the symbol H represents the depth of the body portion 11 of the main body portion 10.
  • the depth H is, for example, 5 mm or more and 20 mm or less.
  • both H / S31 and H / S32 are 0.2 or less.
  • the degree of forming when forming the body 11 by forming the laminate is relatively small. For this reason, it can suppress that display part 10s previously provided in the laminated body is distorted by shaping
  • a laminated body which comprises the main-body part 10 what has a comparatively high tensile strength and cannot be easily extended can be employ
  • a laminated body including a stretched film can be used as a bottom material (first laminated body) constituting the main body 10.
  • the lid portion 20 is disposed on the flange portion 12 so as to cover the housing portion 101 of the main body portion 10, and is joined to the upper surface of the flange portion 12 via the outer edge seal portion 18.
  • the flange part 12 does not need to be joined to the cover part 20 over the whole area, and the non-seal part 19 in which the flange part 12 is not joined to the cover part 20 may exist.
  • the portion on the third edge portion 15 side is located on the inner side of the outer edge seal portion 18 extending along the first edge portion 13.
  • the opening means 17 is configured to open the container 1 along the non-seal portion 19.
  • the lid 20 includes a first lid 21 located on the first edge 13 side and a second lid 22 located on the second edge 14 side. May be.
  • the steaming part 30 includes a through-hole 31 formed in the joint seal part 24.
  • the through hole 31 penetrates at least one of the first lid portion 21 and the second lid portion 22.
  • the through hole 31 passes through the second lid portion 22.
  • the through hole 31 is located at the center of the palm seal portion 24 extending in the first direction D1.
  • the through hole 31 may be located at a location shifted from the center of the palm seal portion 24.
  • the through hole 31 may have a V-shape, for example, which is convex toward the housing portion 101.
  • the unsealing means 17 is configured to easily tear the main body 10 and the lid 20 in the first direction D1 in which the first edge 13 extends.
  • the unsealing means 17 includes a notch 17 a formed in the main body 10 and the lid 20 at a position near the first edge 13 in the third edge 15.
  • the notch 17a may be a notch or a notch. The user can tear the main body 10 and the lid 20 in the first direction D1 with the notch 17a as a starting point.
  • the opening means 17 is configured to easily tear the flange portion 12 extending along the first edge portion 13 at a position inside the outer edge seal portion 18 extending along the first edge portion 13.
  • the notch 17a of the opening means 17 is disposed so as to overlap with the non-seal portion 19 of the flange portion 12 extending along the first edge 13 when the notch 17a is viewed along the first direction D1. .
  • the tear line passes through the non-seal portion 19 of the flange portion 12.
  • the flange portion 12 and the lid portion 20 are not joined but are close to each other. For this reason, compared with the case where the main-body part 10 and the cover part 20 are torn in the position of the trunk
  • the unsealing means 17 may be configured to tear the main body 10 and the lid 20 at the position of the body 11. Even in this case, in the present embodiment, as will be described later, since the bottom member 40 constituting the main body portion 10 has tearability, the container 1 can be opened by tearing.
  • the bottom material 40 includes at least a first base material 41 and a thermoplastic resin layer 42.
  • FIG. 42 shows an example in which the bottom material 40 includes a first base material 41, a printed layer 44, and a thermoplastic resin layer 42.
  • the first base material 41 constitutes the outer surface 40 y of the bottom material 40.
  • the thermoplastic resin layer 42 constitutes the inner surface 40 x of the bottom material 40.
  • the print layer 44 can be provided between the first base material 41 and the thermoplastic resin layer 42, and can be provided on the inner surface 40 x side surface of the first base material 41.
  • the inner surface 40x is a surface located on the accommodating portion 101 side in the main body 10
  • the outer surface 40y is a surface located on the opposite side of the inner surface 40x.
  • the first base material 41 has a certain rigidity so as to prevent the main body 10 from extending when the container 1 is opened.
  • the first substrate 41 includes a stretched film that is at least uniaxially stretched, preferably biaxially stretched.
  • a stretched film for example, polyamide such as nylon (ONy) or polyester such as polyethylene terephthalate (PET) can be used.
  • the stretched film included in the first base material 41 is preferably stretched along the first direction D1.
  • the angle formed by the stretching direction of the stretched film contained in the first base material 41 and the first direction D1 is preferably 45 degrees or less, more preferably 30 degrees or less, and 20 degrees or less. More preferably it is.
  • the thickness of the stretched film of the 1st base material 41 is suitably set according to the material used.
  • the thickness of the stretched film of the first base material 41 is 9 ⁇ m or more and 50 ⁇ m or less, preferably 12 ⁇ m or more and 25 ⁇ m or less.
  • a stretched film refers to a film having a tensile elongation of less than 300%, preferably 200% or less, as measured according to JIS K 7127.
  • Specific examples of the nylon film constituting the first substrate 41 are shown in Table 2 together with the thickness and characteristics of each film.
  • Table 3 shows an example of the PET film constituting the first base material 41.
  • the printed layer 44 of the bottom material 40 is a layer printed on the first base material 41 in order to show product information or impart aesthetics to the main body 10.
  • the print layer 44 expresses characters, numbers, symbols, figures, patterns, and the like.
  • an ink for gravure printing or an ink for flexographic printing can be used as a material constituting the printing layer 44.
  • the ink constituting the printing layer 44 includes a binder and a pigment.
  • the binder includes, for example, polyurethane.
  • Polyurethane is a cured product produced by a reaction between a polyol as a main agent and an isocyanate compound as a curing agent.
  • the thermoplastic resin layer 42 is a layer that forms a seal portion such as the outer edge seal portion 18 by melting.
  • a material constituting the thermoplastic resin layer 42 one or more resins selected from polyethylene such as low density polyethylene and linear low density polyethylene, and polypropylene can be used.
  • the thermoplastic resin layer 42 can be an unstretched film.
  • An unstretched film refers to a film having a tensile elongation of 300% or more, preferably 400% or more as measured according to JIS K 7127.
  • the thermoplastic resin layer 42 may be a single layer or a multilayer.
  • the thermoplastic resin layer 42 preferably includes an unstretched film.
  • the thickness of the thermoplastic resin layer 42 is, for example, 30 ⁇ m or more and 100 ⁇ m or less.
  • the adhesive resin layer includes low density polyethylene, medium density polyethylene, high density polyethylene, linear low density polyethylene, polyethylene such as a copolymer with ethylene- ⁇ olefin polymerized using a metallocene catalyst, and ethylene-vinyl acetate. Copolymers, ethylene-acrylic acid copolymers, ethylene-ethyl acrylate copolymers, ethylene-methacrylic acid copolymers, ethylene-methyl methacrylate copolymers, ethylene-maleic acid copolymers, etc.
  • One or more resins selected from saturated carboxylic acid copolymers and ionomer resins can be used in combination.
  • An adhesive agent is produced
  • an adhesive contains the hardened
  • the main agent include a polyol
  • the ether-based two-component reactive adhesive include polyether polyurethane.
  • the polyether polyurethane is a cured product produced by a reaction between a polyether polyol as a main agent and an isocyanate compound as a curing agent.
  • the ester-based two-component reactive adhesive include polyester polyurethane and polyester.
  • Polyester polyurethane is a cured product produced by a reaction between a polyester polyol as a main agent and an isocyanate compound as a curing agent. Moreover, you may use an acrylic polyol as a main ingredient.
  • the bottom material 40 may further include a second base material 43 positioned between the first base material 41 and the thermoplastic resin layer 42.
  • the second base material 43 is located between the print layer 44 provided on the first base material 41 and the thermoplastic resin layer 42.
  • the second base material 43 preferably includes a stretched film that is preferably at least uniaxially stretched, preferably biaxially stretched.
  • a material constituting the stretched film the same material as the first base material 41 can be used.
  • the stretched film included in the second base material 43 is also preferably stretched along the first direction D1.
  • the angle formed by the stretch direction of the stretched film contained in the second base material 43 and the first direction D1 is preferably 45 degrees or less, more preferably 30 degrees or less, and 20 degrees or less. More preferably it is.
  • polyethylene terephthalate can be used as a material constituting the stretched film of the first substrate 41.
  • the thickness of the stretched film of the first substrate 41 is, for example, 9 ⁇ m or more and 50 ⁇ m or less, preferably 12 ⁇ m or more and 25 ⁇ m or less.
  • Specific examples of the PET film constituting the first substrate 41 are the same as those in the above-described example shown in FIG. 42 and Table 3.
  • the above-described adhesive resin layer or adhesive is provided between the first base material 41 and the second base material 43 provided with the printing layer 44 and between the second base material 43 and the thermoplastic resin layer 42.
  • An adhesive layer may be provided.
  • the bottom material 40 may further include an intermediate layer 45 located between the first base material 41 and the thermoplastic resin layer 42.
  • the intermediate layer 45 is located between the printing layer 44 provided on the first base material 41 and the thermoplastic resin layer 42.
  • the intermediate layer 45 includes, for example, a gas barrier layer.
  • a gas barrier layer for example, a vapor deposition layer of a metal oxide such as aluminum oxide or an inorganic oxide such as silicon oxide can be provided.
  • a resin layer having a high gas barrier property such as an ethylene-vinyl alcohol copolymer (EVOH), a polyvinylidene chloride resin (PVDC), or an aliphatic polyamide such as nylon MXD6 may be provided as the gas barrier layer. .
  • EVOH ethylene-vinyl alcohol copolymer
  • PVDC polyvinylidene chloride resin
  • nylon MXD6 aliphatic polyamide
  • the thickness of the intermediate layer 45 is, for example, not less than 12 ⁇ m and not more than 25 ⁇ m.
  • the lid member (second laminate) 50 has a layer configuration similar to that of the bottom member 40.
  • the lid member 50 includes at least a first base material and a thermoplastic resin layer.
  • the lid member 50 includes a first base material that constitutes the outer surface, a thermoplastic resin layer that constitutes the inner surface, a printing layer provided on the first base material, You may have.
  • the lid member 50 may further include a second base material positioned between the first base material and the thermoplastic resin layer.
  • the lid member 50 may further include an intermediate layer positioned between the first base material and the thermoplastic resin layer.
  • the layer configuration of the bottom member 40 and the layer configuration of the lid member 50 may be the same or different.
  • the configuration of the first base material, the printing layer, the thermoplastic resin layer, and the second base material of the lid member 50 is the same as that of the first base material 41, the printing layer 44, the thermoplastic resin layer 42, and the second base material 43 of the bottom material 40. It is the same as that of the structure.
  • the first base material of the lid member 50 may also include a stretched film stretched at least uniaxially like the first base material 41 of the bottom material. Thereby, when opening the container 1, it can suppress that the cover part 20 expands.
  • the degree of drawing when the bottom member 40 is formed to form the body portion 11 is relatively small.
  • the bottom material 40 a material having a relatively high tensile strength and hardly stretched can be employed.
  • the tensile strength of the bottom material 40 is 40 MPa or more, preferably 50 MPa or more, and more preferably 60 MPa or more.
  • FIGS. 45 and 46 a method for measuring the tensile strength of the bottom material 40 will be described with reference to FIGS. 45 and 46.
  • the measuring device for example, A & D Tensilon Universal Material Testing Machine RTC-1310 can be used.
  • a test piece 90 including a bottom material 40 is prepared.
  • the test piece 90 is obtained, for example, by cutting out a part of the main body 10 constituted by the bottom material 40.
  • a one-dot chain line marked with a symbol XXXXV shows an example of a part of the bottom portion 11 a of the body portion 11 of the main body portion 10 cut out in order to create the test piece 90.
  • the test piece 90 has a rectangular shape including a long side having a length M1 and a short side having a length M2. As shown in FIG. 40, the test piece 90 is cut out from the main body 10 so that the direction of the long side of the test piece 90 coincides with the first direction D1.
  • both ends in the long side direction of the test piece 90 are gripped by the first gripping tool 91 and the second gripping tool 92, respectively.
  • a distance M3 between the first gripping tool 91 and the second gripping tool 92 is 50 mm.
  • the short side length M2 of the test piece 90 is 10 mm.
  • the long side length M1 is determined such that a predetermined distance M3 can be secured. For example, the length M1 of the long side is 100 mm or more.
  • the second gripper 92 is displaced relative to the first gripper 91 along the direction of the long side of the test piece 90 so that the distance M3 gradually increases.
  • the speed at which the second gripping tool 92 is displaced relative to the first gripping tool 91 is 200 mm / min.
  • the load acting on the second gripping tool 92 is measured when the distance M3 becomes 90 mm. Further, the measured load is divided by the cross-sectional area of the test piece 90 before being pulled by the first gripping tool 91 and the second gripping tool 92, and the calculated value is taken as the tensile strength [MPa] of the test piece 90.
  • the main body 10 since the degree of draw forming applied to the bottom material 40 is small, the main body 10 can be manufactured using the bottom material 40 having high tensile strength. Moreover, it can suppress that the display part 10s previously provided in the bottom material 40 by the printing layer 44 is distorted.
  • tearability Next, the tearability of the above-described bottom member 40 and lid member 50 will be described.
  • tear strength is used as an index of tearability.
  • a method for measuring the tear strength will be described with reference to FIGS.
  • As the measuring device for example, ATC-made Tensilon Universal Material Testing Machine RTC-1310 can be used.
  • a test piece 95 including a bottom member 40 and a lid member 50 stacked on each other is prepared.
  • the test piece 95 is obtained, for example, by cutting out a part of the main body part 10 constituted by the bottom material 40 and a part of the lid part 20 constituted by the lid material 50.
  • a dashed-dotted line frame denoted by reference symbol XXXXVII shows an example of a part of the main body 10 and a part of the lid 20 cut out in order to create the test piece 95.
  • the test piece 95 includes a portion where the bottom member 40 and the lid member 50 are joined by a seal portion such as the outer edge seal portion 18.
  • a seal portion such as the outer edge seal portion 18 in the state of the container 1 becomes a seal portion 96 in the test piece 95 shown in FIG.
  • the test piece 95 includes both a part constituting the body part 11 of the main body part 10 and a part constituting the flange part 12 in the bottom material 40.
  • the test piece 95 mainly includes a portion constituting the flange portion 12 of the main body portion 10 in the bottom material 40 and does not include any or almost all a portion constituting the trunk portion 11 of the main body portion 10. May be.
  • the test piece 95 has a rectangular shape including a long side having a length L31 and a short side having a length L32.
  • reference numerals 95a and 95b represent end portions in the long side direction (hereinafter also referred to as first end portion and second end portion).
  • the seal portion 96 extends along the first end portion 95a.
  • Reference numerals 95c and 95d denote end portions in the direction of the short side (hereinafter also referred to as a third end portion and a fourth end portion).
  • the test piece 95 is cut out from the container 1 so that the direction of the long side of the test piece 95 coincides with the first direction D1.
  • a cut 97 extending over the distance L33 in the long side direction is formed at the intermediate point in the short side direction of the first end portion 95a.
  • the notch 97 is formed so that the end point reaches a portion where the bottom member 40 and the lid member 50 are not joined.
  • a portion of the first end portion 95a closer to the third end portion 95c than the notch 97 is gripped by the first gripper 99a. Further, a portion of the first end portion 95a on the fourth end portion 95d side is held by the second holding tool 99b. Thereafter, the second gripping tool 99 b is displaced toward the second end portion 95 b in the long side direction of the test piece 95. Thereby, the test piece 95 is torn in the long side direction starting from the end point 98 of the notch 97.
  • the speed at which the second gripping tool 99b is displaced relative to the first gripping tool 99a is 200 mm / min. At that time, a force [N] required to displace the second gripper 99b is measured.
  • the displacement of the second gripper 99b is continued over a distance L34 in the long side direction.
  • the maximum value of the force [N] required to displace the second gripping tool 99b during the displacement of the second gripping tool 99b over the distance L34 is defined as the tear strength [N] of the test piece 95.
  • the tear strength of the test piece 95 reflects the tearability of the bottom member 40 constituting the main body 10 and the tearability of the lid member 50 constituting the lid 20.
  • the distance L33 of the notch 97 is, for example, 30 mm.
  • the short side length L2 is 25 mm.
  • the distance L34 at which the test piece 95 is torn in the measurement is 50 mm.
  • the long side length L31 is determined such that a predetermined distance L33 and a distance L34 can be secured. For example, the length L31 of the long side is 100 mm or more.
  • the distance L33 of the notch 97 may be made smaller than 30 mm.
  • a member such as a tape may be provided on the first end portion 95a so that the first end portion 95a can be easily gripped by the first gripper 99a and the second gripper 99b.
  • the seal portion 96 may not be present at the first end portion 95a.
  • the tear strength [N] of the test piece 95 including a part of the main body part 10 and a part of the lid part 20 according to the present embodiment is at least 15 N or less, more preferably 10 N or less. Thereby, it becomes easy to tear the main-body part 10 comprised by the bottom material 40, and the cover part 20 comprised by the cover material 50 by tearing. This makes it possible to open the container 1 by tearing the container 1.
  • the container 1 according to the present embodiment is configured such that the container 1 can be opened by tearing the main body 10 and the lid 20 using the opening means 17. For this reason, the easy peel property is not required for the bottom member 40 and the lid member 50.
  • the bottom member 40 and the lid member 50 were joined to each other to produce a rectangular test piece 63.
  • the test piece 63 has a width (short side) of 15 mm.
  • the bottom material 40 and the cover material 50 are peeled over 15 mm from one front-end
  • the already peeled portions of the bottom member 40 and the lid member 50 are respectively held by the first holding tool 71 and the second holding tool 72 of the measuring instrument.
  • the gripping tools 71 and 72 are pulled at a speed of 300 mm / min in directions opposite to each other in the direction orthogonal to the surface direction of the portion where the bottom member 40 and the lid member 50 are still joined. Then, as shown in FIG. 13 of the first embodiment, the maximum value of the tensile stress is measured.
  • the maximum value of the tensile stress is measured for the five test pieces 63, and the average value is defined as the bonding strength between the bottom member 40 and the lid member 50.
  • the distance K between the gripping tools 71 and 72 when starting to pull is 20 mm, and the distance K between the gripping tools 71 and 72 when finishing pulling is 40 mm.
  • the environment during measurement is a temperature of 25 ° C. and a relative humidity of 50%.
  • the joint strength at a width of 15 mm of the test piece 63 to which the bottom member 40 and the lid member 50 according to the present embodiment are joined may be, for example, 23N or more, or 40N or more.
  • the bottom material 40 is prepared and transported in the transport direction T. As shown in FIG. 51, a display portion 10s that is visible when the bottom material 40 is viewed from the outer surface 40y is formed in advance on the bottom material 40 by the print layer 44 described above.
  • the bottom material 40 is drawn.
  • the male mold 81 is disposed on the inner surface 40x side
  • the female mold 82 is disposed on the outer surface 40y side.
  • the male mold 81 is relatively moved toward the female mold 82, and the bottom material 40 is pushed into the recess of the female mold 82.
  • drum 11 can be formed in the bottom material 40.
  • the bottom material 40 may be fixed using a pressing plate 83 in order to prevent the bottom material 40 from being stretched at a portion other than the body portion 11.
  • a vacuum state having a pressure lower than the atmospheric pressure may be used.
  • the above-described drawing is performed at a temperature at which the temperature of the bottom material 40 is lower than the melting point of, for example, the thermoplastic resin layer 42 of the bottom material 40 or a temperature lower than the glass transition temperature of the first base material 41. It is performed at a temperature lower than 120 ° C., preferably 60 ° C. or higher and 100 ° C. or lower, or at room temperature.
  • the depth of the body portion 11 is relatively small, and therefore, the degree of expansion of the bottom material 40 during the draw forming is also small. Accordingly, even if the temperature is lower than the melting point of the thermoplastic resin layer 42 or the glass transition temperature of the first base material 41, desired drawing can be performed on the bottom material 40.
  • the extent of the bottom material 40 is small, it is possible to prevent the display portion 10s provided on the bottom material 40 from being distorted.
  • Both the pressure adjustment described above and the temperature adjustment of the bottom material 40 may be performed.
  • the atmosphere in the space on the female mold 82 side or the atmosphere in the space on the male mold 81 side is set in a vacuum state.
  • 40 may be brought into close contact with the female mold 82 or the male mold 81.
  • the bottom member 40 can be formed using only the female mold 82 or the male mold 81.
  • the atmosphere of the space on the opposite side of the bottom mold 40 from the female mold 82 may be in a compressed air state, and the bottom material 40 may be brought into close contact with the female mold 82.
  • the bottom material 40 can be formed only by the female mold 82.
  • Example 1 ⁇ Type: Male 81 and Female 82 The temperature of the bottom material 40: 20 ° C. or more and 100 ° C. or less The pressure in the space on the male mold 81 side: Above atmospheric pressure and 5 atm or less The pressure in the space on the female mold 82 side: 0.05 atm or more and 0.3 atm or less [ Example 2] ⁇ Type: Female type 82 The temperature of the bottom material 40: 60 ° C. or more and 100 ° C.
  • the lid member 50 is overlapped on the bottom member 40, and the trunk portion 11 filled with the contents 5 is covered with the lid member 50. Subsequently, using the joining device 85, the lid member 50 is joined to the flange portion 12 that spreads outward from the upper portion of the body portion 11 of the bottom member 40, thereby forming the outer edge seal portion 18.
  • the bottom member 40 and the lid member 50 are cut at the outer edge seal portion 18.
  • the container 1 including the main body 10 having the body 11 and the flange 12 and the lid 20 joined to the flange 12 and containing the contents 5 can be obtained.
  • the container 1 is heated using a microwave oven or the like. Thereby, the water which exists in the contents 5 and the accommodating part 101 evaporates, and the pressure of the accommodating part 101 increases. As a result, as shown in FIG. 52, a portion of the palm seal portion 24 that is close to the center of the housing portion 101 is peeled, and a peeled portion 34 is formed in the vicinity of the through hole 31. When peeling of the palm seal portion 24 proceeds and the peeling portion 34 reaches the through hole 31, the vapor in the housing portion 101 comes out through the through hole 31 to the outside.
  • the bottom member 40 and the lid member 50 are configured so that the tear strength of the main body portion 10 and the lid portion 20 is 15 N or less. For this reason, as shown in FIG. 53, the tearing of the main body 10 and the lid 20 can be advanced in the first direction D1 along the first edge 13 with the notch 17a as a starting point.
  • the contents 5 are filled in the bottom material 40 on which the body 11 is formed, and then the body 11 is covered with the lid 50. For this reason, the content 5 can be easily filled compared with a pouch type container. That is, the container 1 according to the present embodiment has filling suitability.
  • the base material of the bottom material 40 constituting the main body portion 10 of the container 1 according to the present embodiment includes a stretched film. And when providing the printing layer 44 in a stretched film, conveying a elongate stretched film, since a stretched film is hard to expand and contract at the time of conveyance compared with an unstretched film, the printed layer 44 can be provided with sufficient positional accuracy. . For this reason, the container provided with the main-body part which is excellent in the printability of a display part can be provided.
  • the degree of drawing in the main body 10 of the container 1 according to the present embodiment is relatively small.
  • the laminated body provided with tearability such as the laminated body containing a stretched film, can be used as the bottom material 40 which comprises the main-body part 10.
  • tearability can be imparted to the container 1.
  • it can suppress that the display part 10s previously provided in the bottom material 40 is distorted.
  • the steaming part 30 includes the through hole 31 formed in the joint seal part 24
  • the structure of the steaming part 30 is arbitrary.
  • the steaming part 30 includes a projecting seal part 35 projecting inward from the outer edge seal part 18, a non-seal part 37 adjacent to the projecting seal part 35, and a lid part in the non-seal part 37. 20 may be included.
  • a cut may be provided instead of the through hole 36.
  • the opening means 17 showed the example containing the notch 17a formed in edge parts, such as the 3rd edge part 15 of the flange part 12. As shown in FIG.
  • the configuration of the opening means 17 is arbitrary as long as the tearability of the main body 10 and the lid 20 can be improved.
  • the opening means 17 may be a region including a scar group 17b formed so as to spread along the first direction D1 from the third edge 15 side to the fourth edge 16 side. Good.
  • the scar group includes, for example, a plurality of through holes formed so as to penetrate through the first base material 41 of the bottom member 40 constituting the flange portion 12 of the main body portion 10 but not through the thermoplastic resin layer 42. Further, the scar group includes, for example, a plurality of through holes formed so as to penetrate the first base material 41 of the lid member 50 constituting the lid portion 20 but not penetrate the thermoplastic resin layer 42.
  • the opening means 17 may be a region including a half-cut line formed so as to spread along the first direction D1 from the third edge portion 15 side to the fourth edge portion 16 side. Further, the scar group may be formed so as to penetrate from the outer surface to the inner surface of the bottom member 40 and the lid member 50.
  • the third embodiment will be described more specifically by way of examples.
  • the third embodiment is not limited to the description of the following examples unless it exceeds the gist.
  • Example C1 As the bottom material 40 constituting the main body 10, a laminate that is the same as the bottom material 40 shown in FIG. 43 except that the printed layer 44 is not provided was prepared.
  • the first base material 41 biaxially stretched PET having a thickness of 12 ⁇ m was used.
  • stretched nylon (ONY) having a thickness of 15 ⁇ m was used.
  • the thermoplastic resin layer 42 unstretched polypropylene (CPP) having a thickness of 70 ⁇ m was used.
  • a cured product of a polyether polyol and an isocyanate compound was used.
  • the laminated body which has the same layer structure as the bottom material 40 as the cover material 50 which comprises the cover part 20 was prepared. The thickness of the bottom member 40 and the lid member 50 was 101 ⁇ m.
  • the container 1 shown in FIG. 40 was produced using the bottom material 40 and the lid material 50.
  • a test piece 90 shown in FIG. 45 was cut out from the bottom 11 a of the body 11 of the main body 10 of the container 1.
  • the tensile strength of the three test pieces 90 was measured based on the method shown in FIGS. 45 and 46. As a result, the tensile strength was in the range of 40 MPa to 72 MPa.
  • a test piece 95 shown in FIG. 47 was cut out from the container 1. Subsequently, the tear strength of the three test pieces 95 was measured based on the method shown in FIGS. 47 and 48. As a result, the tear strength was in the range of 3N or more and 15N or less.
  • the container 1 shown in FIG. 40 was produced using the bottom material 40 and the lid material 50. Moreover, it carried out similarly to the case of Example C1, and cut out the test piece from the bottom face of the trunk
  • the laminate In a deep-drawn container as disclosed in Japanese Patent Application Laid-Open No. 2006-232280, the laminate is required to be easily stretched from the viewpoint of moldability when producing a body having a large depth.
  • the ease of elongation of the laminate and the ease of tearing of the laminate are in a trade-off relationship. This is because, when trying to tear a laminate that is easily stretched, the force applied to the laminate mainly acts as a force that stretches the laminate, and does not easily act as a force that breaks the laminate. For this reason, in a deep-drawn container, it is difficult to employ a method of tearing the container as a method for opening the container. It has been adopted.
  • a layer for joining the lid portion to the flange portion for example, a thermoplastic resin layer
  • a thermoplastic resin layer is required to have a property of being easily peeled off by applying force, so-called easy peel property.
  • the thermoplastic resin layer having easy peel properties is expensive, and the manufacturing cost of the container is increased.
  • the contents are prepared after joining the outer edges other than the upper edge of the two laminated bodies to produce the pouch. It is filled from the opening of the upper edge.
  • a pouch-type container compared to a container of a type in which a body portion filled with contents is sealed with a lid, such as a deep-drawn container, an opening portion through which the contents to be filled passes is provided. Narrow dimensions and poor filling of contents.
  • This embodiment is intended to provide a container that can effectively solve these problems and a method for manufacturing the same.
  • a container having an accommodating part for accommodating contents is a main body part having a trunk part defining the accommodating part and a flange part extending outward from the upper part of the trunk part, and a bottom material ( A lid part joined to the flange part of the main body part via an outer edge seal part so as to cover the housing part, and is constituted by a lid material (second laminated body).
  • the tear strength of the main body portion and the lid portion is 15 N or less.
  • a method for manufacturing a container having a storage portion that stores contents and having a vaporizing portion configured to communicate with the outside when the pressure of the storage portion increases is provided in the storage portion.
  • a bottom material first laminated body
  • An opening means is formed on the flange portion. Drawing is performed at a temperature where the temperature of the bottom material is lower than the melting point of the thermoplastic resin layer of the bottom material.
  • FIG. 56 is a plan view showing the container 1 according to the present embodiment.
  • the container 1 is provided with the main-body part 10, the cover part 20, and the steaming part 30 similarly to the case of 3rd Embodiment.
  • the container 1 further includes an opening means 17 for facilitating opening the container 1 by tearing.
  • the same parts as those in the third embodiment may be denoted by the same reference numerals and detailed description thereof may be omitted.
  • the description thereof may be omitted.
  • the unsealing means 17 is configured to easily tear the main body 10 and the lid 20 in the first direction D1 in which the first edge 13 extends.
  • the unsealing means 17 includes a notch 17 a formed in the main body 10 and the lid 20 at a position near the first edge 13 in the third edge 15.
  • the notch 17a may be a notch or a notch. The user can tear the main body 10 and the lid 20 in the first direction D1 with the notch 17a as a starting point.
  • FIG. 57 is a cross-sectional view showing the case where the container 1 shown in FIG. 56 is viewed along the line XXXXXVII-XXXXVII.
  • the main body portion 10 of the container 1 of the present embodiment has a main body portion 10 from the outer surface side of the bottom material (first laminate) constituting the main body portion 10. The display part visually recognized when 10 is seen does not need to be provided.
  • the tear strength [N] of the test piece 95 including a part of the main body 10 and a part of the lid 20 is at least 15 N or less. , More preferably 10N or less.
  • the feature of providing the palm portion 23 along the B axis that is longer than the A axis, as described in the second embodiment, may be applied to the first, third, and fourth embodiments.
  • the ratio of the length of the B axis to the length of the A axis is, for example, 1.2 or more and 3.0 or less.
  • the bottom material 40 constituting the main body portion 10 described in the third embodiment is laminated on the thermoplastic resin layer 42 constituting the inner surface 40x located on the housing portion 101 side, and the thermoplastic resin layer 42.
  • the feature that the base material of the bottom material 40 includes a stretched film may be applied to the first and second embodiments.
  • the bottom material may further have a printed layer.
  • the tensile strength of the bottom material may be 40 MPa or more, for example.
  • the opening means 17 is formed on the lid portion 20 and the flange portion 12, and the tear strength of the main body portion 10 and the lid portion 20 is 15 N or less.
  • the present invention may be applied to the first and second embodiments.
  • the flange portion 12 includes a first edge portion 13 and a second edge portion 14 that extend in parallel with each other, and the opening means 17 is located at a position inside the outer edge seal portion 18 that extends along the first edge portion 13.
  • the flange portion 12 extending along the first edge portion 13 may be configured to be easily torn.
  • the opening means 17 may include at least a notch or a scar group formed in the flange portion 12.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Food Science & Technology (AREA)
  • Packages (AREA)
  • Closures For Containers (AREA)
  • Package Specialized In Special Use (AREA)

Abstract

Récipient pouvant empêcher divers germes ou autres d'entrer dans le récipient à partir d'une extrémité de pointe d'une partie de butée. Le récipient est pourvu : d'une partie corps ayant une partie cylindre délimitant une partie de réception et une partie bride s'étendant vers l'extérieur à partir d'une partie supérieure de la partie cylindre ; et d'une partie couvercle reliée par l'intermédiaire d'une partie d'étanchéité de bord extérieur à la partie bride de la partie corps de façon à recouvrir la partie de réception, la partie couvercle étant constituée d'un matériau de couvercle replié vers l'arrière au niveau d'une partie de pliage de façon à ce que des portions de celle-ci se chevauchent. La partie couvercle comporte une partie butée dans laquelle des portions du matériau de couvercle se chevauchent et qui s'étend dans une première direction d'une première partie de bord à l'autre partie de bord de la partie couvercle, et a une première partie de couvercle et une seconde partie de couvercle qui sont positionnées de façon à prendre en sandwich la partie butée entre elles et sont constituées par le matériau de couvercle. La partie butée comporte une partie d'étanchéité de butée au niveau de laquelle des surfaces intérieures des portions du matériau de couvercle sont reliées entre elles de façon à s'étendre dans la première direction depuis la première partie de bord jusqu'à l'autre partie de bord de la partie couvercle, et comporte une partie de passage de vapeur comprenant un trou traversant ou une encoche formé dans la partie d'étanchéité de butée. La force d'étanchéité de la partie d'étanchéité de butée est inférieure à celle de la partie d'étanchéité de bord extérieur.
PCT/JP2018/013043 2017-03-29 2018-03-28 Récipient et procédé de fabrication de récipient Ceased WO2018181616A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
US16/499,041 US11479399B2 (en) 2017-03-29 2018-03-28 Container and method for manufacturing container
CN201880020981.2A CN110475729B (zh) 2017-03-29 2018-03-28 容器和容器的制造方法
EP18777998.8A EP3604165B1 (fr) 2017-03-29 2018-03-28 Récipient et procédé de fabrication de récipient
KR1020197031735A KR20190134686A (ko) 2017-03-29 2018-03-28 용기 및 용기의 제조 방법

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
JP2017065855A JP2018167859A (ja) 2017-03-29 2017-03-29 容器及び容器の製造方法
JP2017-065855 2017-03-29
JP2017065754A JP2018167857A (ja) 2017-03-29 2017-03-29 容器及び容器の製造方法
JP2017-065754 2017-03-29
JP2017187125A JP2019059522A (ja) 2017-09-27 2017-09-27 容器及び容器の製造方法
JP2017-187125 2017-09-27

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EP (1) EP3604165B1 (fr)
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Also Published As

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CN110475729B (zh) 2022-08-23
KR20190134686A (ko) 2019-12-04
EP3604165A4 (fr) 2020-12-02
US11479399B2 (en) 2022-10-25
US20200039715A1 (en) 2020-02-06
EP3604165B1 (fr) 2022-04-20
EP3604165A1 (fr) 2020-02-05
CN110475729A (zh) 2019-11-19

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